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GitLab

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<h3>

Ben Gamari pushed to branch wip/backport-MR951

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/175d49e6c8ae1cfff0b8836a4a067d256a5a23e8">175d49e6</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Introduce fragile modifier

Now since we have been a bit more stringent in testsuite cleanliness we

have been marking a lot of tests as fragile using the `skip` modifier.

However, this unfortunately means that we lose the association with the

ticket number documenting the fragility.

Here we introduce `fragile` and `fragile_for` to retain this

information.

(cherry picked from commit 4ca271d1880a6f4c5f49869de7f1920a2073adb6)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/18ffc38669bf0a6c650431b545fdfbfd7b79117a">18ffc386</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Mark heapprof001 as fragile on i386

(cherry picked from commit 910185a3eb5fd2148e42d39f6374ab03d098b682)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/a9a34082b7398e54e9927e2eedc2d959a50cd2c6">a9a34082</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Mark heapprof001 as fragile on all platforms

See #15382.

(cherry picked from commit 23fc615679072a6fa433460a92f597af2ae388b2)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/9c385294d29be3da71af07dac9845cbf135219e0">9c385294</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">base: Mark CPUTime001 as fragile

As noted in #16224, CPUTime001 has been quite problematic, reporting

non-monotonic timestamps in CI. Unfortunately I've been unable to

reproduce this locally.

(cherry picked from commit 1a3420cabdcf6d7d90c154681230f1150604c097)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/c993dee90b0beba4d33688f9e3b26eea3f686761">c993dee9</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Mark T13167 as fragile in threaded2

As noted in #16536.

(cherry picked from commit b351004702c1a595bcedfa3ffeb4f816d5fd8503)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/5993703cd9330f239b5401dca36dc37d60d536f0">5993703c</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Fix fragile_for test modifier

(cherry picked from commit 658199cce0aabeed77f3bbbbde6abc0c5c3cc83d)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/5e6f261aee196eb5984d192dcb01710b070452b3">5e6f261a</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-12T00:07:25Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Mark threadstatus-T9333 as fragile in ghci way

As noted in #16555.

(cherry picked from commit 64b1684da09ddb3dc480bd0370adc7b002657a39)

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/6a8a448319cbfc7af23dffec33015562d992101b">6a8a4483</a></strong>

<div>

<span>by Richard Eisenberg</span>

<i>at 2019-06-12T12:39:07Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix #16517 by bumping the TcLevel for method sigs

There were actually two bugs fixed here:

1. candidateQTyVarsOfType needs to be careful that it does not

   try to zap metavariables from an outer scope as "naughty"

   quantification candidates. This commit adds a simple check

   to avoid doing so.

2. We weren't bumping the TcLevel in kcHsKindSig, which was used

   only for class method sigs. This mistake led to the acceptance

   of

     class C a where

       meth :: forall k. Proxy (a :: k) -> ()

   Note that k is *locally* quantified. This patch fixes the

   problem by using tcClassSigType, which correctly bumps the

   level. It's a bit inefficient because tcClassSigType does other

   work, too, but it would be tedious to repeat much of the code

   there with only a few changes. This version works well and is

   simple.

And, while updating comments, etc., I noticed that tcRnType was

missing a pushTcLevel, leading to #16767, which this patch also

fixes, by bumping the level. In the refactoring here, I also

use solveEqualities. This initially failed ghci/scripts/T15415,

but that was fixed by teaching solveEqualities to respect

-XPartialTypeSignatures.

This patch also cleans up some Notes around error generation that

came up in conversation.

Test case: typecheck/should_fail/T16517, ghci/scripts/T16767

(cherry picked from commit a22e51ea6f7a046c87d57ce30d143eef6abee9ff)

</pre>

</li>

</ul>

<h4>20 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#9f8e9eab0dc8b12ae9f92fbb76ddca15c817667a">

compiler/typecheck/TcCanonical.hs

</a>

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<li class="file-stats">

<a href="#c573dfc3158e7ec41ecc0965becd5f1e6e92a2e6">

compiler/typecheck/TcErrors.hs

</a>

</li>

<li class="file-stats">

<a href="#350c4076427c611b8f14e875a4ca553041c2b847">

compiler/typecheck/TcHsType.hs

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<li class="file-stats">

<a href="#367db94fc37c8c7548dbe545a5302c7a5108e41e">

compiler/typecheck/TcMType.hs

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<li class="file-stats">

<a href="#2799ba786adc98d485fad6003334b913a0069bdc">

compiler/typecheck/TcRnDriver.hs

</a>

</li>

<li class="file-stats">

<a href="#d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813">

compiler/typecheck/TcRnTypes.hs

</a>

</li>

<li class="file-stats">

<a href="#75d517f701402b106e4d98d255eb24b57ba72aab">

compiler/typecheck/TcSimplify.hs

</a>

</li>

<li class="file-stats">

<a href="#bdfa0cc139f61d1236abc1598c5d684b43c357f9">

compiler/typecheck/TcTyClsDecls.hs

</a>

</li>

<li class="file-stats">

<a href="#341fd962c5f2c9fcf8be3dbdaa9a14ee1538af07">

compiler/typecheck/TcType.hs

</a>

</li>

<li class="file-stats">

<a href="#b817c80cbb15890d9a6df41e91d15d7442471f3c">

libraries/base/tests/all.T

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</li>

<li class="file-stats">

<a href="#c591f85f122007bac88228c5ff6fd76b40e6a811">

testsuite/driver/testlib.py

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<li class="file-stats">

<a href="#40142624dc4857a702b52f173a35277f48e3a483">

testsuite/tests/concurrent/should_run/all.T

</a>

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<li class="file-stats">

<a href="#13b8cf7619096f55d161ef6f6892fd8b6399f187">

<span class="new-file">

+

testsuite/tests/ghci/scripts/T16767.script

</span>

</a>

</li>

<li class="file-stats">

<a href="#8c9b98ada81eb0b5ce37764a0ca63adffb8549d6">

<span class="new-file">

+

testsuite/tests/ghci/scripts/T16767.stdout

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</a>

</li>

<li class="file-stats">

<a href="#080fb38cc741d3f1a476696b3373ab7cf48c2aaa">

testsuite/tests/ghci/scripts/all.T

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<li class="file-stats">

<a href="#382baa1450ea74ecf1198bd2e384e396d34d414e">

testsuite/tests/profiling/should_run/all.T

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<li class="file-stats">

<a href="#f80799ecc01331b244dad18a881729fbb1f7bfb5">

<span class="new-file">

+

testsuite/tests/typecheck/should_fail/T16517.hs

</span>

</a>

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<li class="file-stats">

<a href="#5a9a1ea6f14d9aad857ca084d18ff53bec57a93b">

<span class="new-file">

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testsuite/tests/typecheck/should_fail/T16517.stderr

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<li class="file-stats">

<a href="#b9e86d897a62509b0114d81d5e736630d6f68f43">

testsuite/tests/typecheck/should_fail/all.T

</a>

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<li class="file-stats">

<a href="#336d4b3eabb2680482261a40f3a870ff666a17b8">

testsuite/tests/typecheck/should_fail/tcfail134.stderr

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</li>

</ul>

<h4>Changes:</h4>

<li id="9f8e9eab0dc8b12ae9f92fbb76ddca15c817667a">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#9f8e9eab0dc8b12ae9f92fbb76ddca15c817667a"><strong>compiler/typecheck/TcCanonical.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2079,13 +2079,6 @@ What do we do when we have an equality</td>

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<td class="diff-line-num old_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2079

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<td class="diff-line-num new_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2079

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC2079" class="line" lang="haskell"></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="2080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2080

</td>

<td class="diff-line-num new_line" data-linenumber="2080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2080

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<pre style="margin: 0;"> <span id="LC2080" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">where k1 and k2 differ? This Note explores this treacherous area.</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="2081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2081

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<td class="diff-line-num new_line" data-linenumber="2081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2081

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC2081" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2082

</td>

<td class="diff-line-num new_line old" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2082" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">First off, the question above is slightly the wrong question. Flattening</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="2083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2083

</td>

<td class="diff-line-num new_line old" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2083" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a tyvar will flatten its kind (Note [Flattening] in TcFlatten); flattening</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="2084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2084

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<td class="diff-line-num new_line old" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC2084" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the kind might introduce a cast. So we might have a casted tyvar on the</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="2085" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2085

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<td class="diff-line-num new_line old" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC2085" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">left. We thus revise our test case to</span></span>

</pre>

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2086

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC2086" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2087" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2087

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<td class="diff-line-num new_line old" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2087" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (tv |> co :: k1) ~ (rhs :: k2)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2088" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2088

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<td class="diff-line-num new_line old" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2088" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2089" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2089

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<td class="diff-line-num new_line" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2082

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<pre style="margin: 0;"> <span id="LC2082" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We must proceed differently here depending on whether we have a Wanted</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2090" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2090

</td>

<td class="diff-line-num new_line" data-linenumber="2083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2083

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<pre style="margin: 0;"> <span id="LC2083" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">or a Given. Consider this:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2091" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2091

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<td class="diff-line-num new_line" data-linenumber="2084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2084

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<pre style="margin: 0;"> <span id="LC2084" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2109,36 +2102,33 @@ The reason for this odd behavior is much the same as</td>

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2109

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<td class="diff-line-num new_line" data-linenumber="2102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2102

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<pre style="margin: 0;"> <span id="LC2102" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Wanteds do not rewrite Wanteds] in TcRnTypes: note that the</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2110

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<td class="diff-line-num new_line" data-linenumber="2103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2103

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<pre style="margin: 0;"> <span id="LC2103" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">new `co` is a Wanted.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2111

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<td class="diff-line-num new_line" data-linenumber="2104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2104

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<pre style="margin: 0;"> <span id="LC2104" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2112" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2112

</td>

<td class="diff-line-num new_line old" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2112" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">   The solution is then not to use `co` to "rewrite" -- that is, cas</span>t</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2113

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<td class="diff-line-num new_line old" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2113" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">   -- `w`, but instead to keep `w` heterogeneous and</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2114

</td>

<td class="diff-line-num new_line old" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2114" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">   irreducible. Given that we're not using `co`, there is no reason to</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2115" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2115

</td>

<td class="diff-line-num new_line old" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2115" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">   collect evidence for it, so `co` is born a Derived, with a CtOrigin</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2116

</td>

<td class="diff-line-num new_line old" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2116" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">   of KindEqOrigin.</span></span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2105

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<pre style="margin: 0;">+<span id="LC2105" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">The solution is then not to use `co` to "rewrite" -- that is, cast -- `w`, bu</span>t</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2106" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2106

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<pre style="margin: 0;">+<span id="LC2106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">instead to keep `w` heterogeneous and irreducible. Given that we're not using</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2107

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<pre style="margin: 0;">+<span id="LC2107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">`co`, there is no reason to collect evidence for it, so `co` is born a</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2108

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<pre style="margin: 0;">+<span id="LC2108" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">Derived, with a CtOrigin of KindEqOrigin. When the Derived is solved (by</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2109

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<pre style="margin: 0;">+<span id="LC2109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">unification), the original wanted (`w`) will get kicked out. We thus get</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2117

</td>

<td class="diff-line-num new_line" data-linenumber="2110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2110

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<pre style="margin: 0;"> <span id="LC2110" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2118" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2118

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<td class="diff-line-num new_line old" data-linenumber="2111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2118" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">When the Derived is solved (by unification), the original wanted (`w`)</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2119

</td>

<td class="diff-line-num new_line old" data-linenumber="2111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">will get kicked out.</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2111

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<pre style="margin: 0;">+<span id="LC2111" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">[D] _ :: k ~ Type</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2112" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2112

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<pre style="margin: 0;">+<span id="LC2112" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">[W] w :: (alpha :: k) ~ (Int :: Type)</span></span></span>

</pre>

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2120

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<td class="diff-line-num new_line" data-linenumber="2113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2113

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<pre style="margin: 0;"> <span id="LC2113" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2121" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2121

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<td class="diff-line-num new_line old" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2121" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that, if we had [G] co1 :: k ~ Type available, then none of this code would</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2122

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<td class="diff-line-num new_line old" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2122" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">trigger, because flattening would have rewritten k to Type. That is,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2123" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2123

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<td class="diff-line-num new_line old" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2123" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`w` would look like [W] (alpha |> co1 :: Type) ~ (Int :: Type), and the tyvar</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2124" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2124

</td>

<td class="diff-line-num new_line old" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2124" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">case will trigger, correctly rewriting alpha to (Int |> sym co1).</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2114

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<pre style="margin: 0;">+<span id="LC2114" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that the Wanted is unchanged and will be irreducible. This all happens</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2115" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2115

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<pre style="margin: 0;">+<span id="LC2115" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in canEqTyVarHetero.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2116

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<pre style="margin: 0;">+<span id="LC2116" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2117

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<pre style="margin: 0;">+<span id="LC2117" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that, if we had [G] co1 :: k ~ Type available, then we never get</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2118" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2118

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<pre style="margin: 0;">+<span id="LC2118" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to canEqTyVarHetero: canEqTyVar tries flattening the kinds first. If</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2119

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<pre style="margin: 0;">+<span id="LC2119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we have [G] co1 :: k ~ Type, then flattening the kind of alpha would</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2120

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<pre style="margin: 0;">+<span id="LC2120" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rewrite k to Type, and we would end up in canEqTyVarHomo.</span></span>

</pre>

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2125

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2121

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<pre style="margin: 0;"> <span id="LC2121" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2126

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<td class="diff-line-num new_line" data-linenumber="2122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2122

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<pre style="margin: 0;"> <span id="LC2122" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Successive canonicalizations of the same Wanted may produce</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2127

</td>

<td class="diff-line-num new_line" data-linenumber="2123" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2123

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<pre style="margin: 0;"> <span id="LC2123" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">duplicate Deriveds. Similar duplications can happen with fundeps, and there</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2128

</td>

<td class="diff-line-num new_line" data-linenumber="2124" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2124

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<pre style="margin: 0;"> <span id="LC2124" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">seems to be no easy way to avoid. I expect this case to be rare.</span></span>

</pre>

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2129

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<td class="diff-line-num new_line" data-linenumber="2125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2125

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<pre style="margin: 0;"> <span id="LC2125" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2130

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<td class="diff-line-num new_line old" data-linenumber="2126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For Givens, this problem doesn't bite, so a heterogeneous Given gives</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2126

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<pre style="margin: 0;">+<span id="LC2126" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For Givens, this problem (the Wanteds-rewriting-Wanteds action of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2127

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<pre style="margin: 0;">+<span id="LC2127" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a kind coercion) doesn't bite, so a heterogeneous Given gives</span></span>

</pre>

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2131

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<td class="diff-line-num new_line" data-linenumber="2128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2128

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<pre style="margin: 0;"> <span id="LC2128" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rise to a Given kind equality. No Deriveds here. We thus homogenise</span></span>

</pre>

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2132

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<td class="diff-line-num new_line old" data-linenumber="2129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the Given (see the "homo_co" in the Given case in canEqTyVar) and</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2133" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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2129

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<pre style="margin: 0;">+<span id="LC2129" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the Given (see the "homo_co" in the Given case in canEqTyVar<span class="idiff left right">Hetero</span>) and</span></span>

</pre>

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2133

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2130

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<pre style="margin: 0;"> <span id="LC2130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">carry on with a homogeneous equality constraint.</span></span>

</pre>

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2134

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2131

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<pre style="margin: 0;"> <span id="LC2131" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2135" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2135

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<pre style="margin: 0;">-<span id="LC2135" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Separately, I (Richard E) spent some time pondering what to do in the case</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2136" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2136

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<pre style="margin: 0;">-<span id="LC2136" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that we have [W] (tv |> co1 :: k1) ~ (tv |> co2 :: k2) where k1 and k2</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2137" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2137

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<td class="diff-line-num new_line old" data-linenumber="2132" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2137" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">differ. Note that the tv is the same. (This case is handled as the first</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2138

</td>

<td class="diff-line-num new_line old" data-linenumber="2132" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2138" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">case in canEqTyVarHomo.) At one point, I thought we could solve this limited</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2139" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2139

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<td class="diff-line-num new_line old" data-linenumber="2132" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2139" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">form of heterogeneous Wanted, but I then reconsidered and now treat this case</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2140

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<td class="diff-line-num new_line old" data-linenumber="2132" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2140" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">just like any other heterogeneous Wanted.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2141

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<pre style="margin: 0;">-<span id="LC2141" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2142

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2132

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<pre style="margin: 0;"> <span id="LC2132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Type synonyms and canonicalization]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2143" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2143

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<td class="diff-line-num new_line" data-linenumber="2133" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2133

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<pre style="margin: 0;"> <span id="LC2133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2144" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2144

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2134

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<pre style="margin: 0;"> <span id="LC2134" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We treat type synonym applications as xi types, that is, they do not</span></span>

</pre>

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<br>

</li>

<li id="c573dfc3158e7ec41ecc0965becd5f1e6e92a2e6">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#c573dfc3158e7ec41ecc0965becd5f1e6e92a2e6"><strong>compiler/typecheck/TcErrors.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -158,14 +158,22 @@ reportUnsolved wanted</td>

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell"><span class="cd">-- | Report *all* unsolved goals as errors, even if -fdefer-type-errors is on</span></span>

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<pre style="margin: 0;"> <span id="LC159" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- However, do not make any evidence bindings, because we don't</span></span>

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<pre style="margin: 0;"> <span id="LC160" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- have any convenient place to put them.</span></span>

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: Type-level holes are OK, because there are no bindings.</span></span>

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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Deferring coercion errors to runtime]</span></span>

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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Used by solveEqualities for kind equalities</span></span>

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<pre style="margin: 0;">-<span id="LC163" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      (see Note [Fail fast on kind errors] in TcSimplify<span class="idiff left right">]</span></span></span>

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      (see Note [Fail fast on kind errors] in TcSimplify<span class="idiff left right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC165" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and for simplifyDefault.</span></span>

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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell"><span class="n" style="color: #333;">reportAllUnsolved</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">WantedConstraints</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell"><span class="n" style="color: #333;">reportAllUnsolved</span> <span class="n" style="color: #333;">wanted</span></span>

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<pre style="margin: 0;"> <span id="LC168" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">ev_binds</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newNoTcEvBinds</span></span>

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<pre style="margin: 0;">-<span id="LC168" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">report_unsolved</span> <span class="kt" style="color: #458; font-weight: 600;">TypeError</span> <span class="kt" style="color: #458; font-weight: 600;">HoleError</span> <span class="kt" style="color: #458; font-weight: 600;">HoleError</span> <span class="kt" style="color: #458; font-weight: 600;">HoleError</span></span>

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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">partial_sigs</span>      <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">xoptM</span> <span class="kt" style="color: #458; font-weight: 600;">LangExt</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">PartialTypeSignatures</span></span>

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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">warn_partial_sigs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">woptM</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_WarnPartialTypeSignatures</span></span>

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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">type_holes</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">partial_sigs</span>  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HoleError</span></span>

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell">                        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">warn_partial_sigs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HoleWarn</span></span>

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<td class="diff-line-num new new_line" data-linenumber="174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell">                        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>         <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HoleDefer</span></span>

</pre>

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175

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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">report_unsolved</span> <span class="kt" style="color: #458; font-weight: 600;">TypeError</span> <span class="kt" style="color: #458; font-weight: 600;">HoleError</span> <span class="n" style="color: #333;">type_holes</span> <span class="kt" style="color: #458; font-weight: 600;">HoleError</span></span>

</pre>

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169

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<pre style="margin: 0;"> <span id="LC177" class="line" lang="haskell">                         <span class="n" style="color: #333;">ev_binds</span> <span class="n" style="color: #333;">wanted</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="cd">-- | Report all unsolved goals as warnings (but without deferring any errors to</span></span>

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<br>

</li>

<li id="350c4076427c611b8f14e875a4ca553041c2b847">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#350c4076427c611b8f14e875a4ca553041c2b847"><strong>compiler/typecheck/TcHsType.hs</strong></a>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">TcHsType</span> <span class="p">(</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Type signatures</span></span>

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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">kc<span class="idiff left right">H</span>sSigType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcClassSigType</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">kc<span class="idiff left right">Clas</span>sSigType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcClassSigType</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcHsSigType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcHsSigWcType</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcHsPartialSigType</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">funsSigCtxt</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">addSigCtxt</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprSigCtxt</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -187,24 +187,40 @@ tcHsSigWcType :: UserTypeCtxt -> LHsSigWcType GhcRn -> TcM Type</td>

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- already checked this, so we can simply ignore it.</span></span>

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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsSigWcType</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">sig_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcHsSigType</span> <span class="n" style="color: #333;">ctxt</span> <span class="p">(</span><span class="n" style="color: #333;">dropWildCards</span> <span class="n" style="color: #333;">sig_ty</span><span class="p">)</span></span>

</pre>

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189

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<pre style="margin: 0;"> <span id="LC189" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

190

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<pre style="margin: 0;">-<span id="LC190" class="line" lang="haskell"><span class="n" style="color: #333;">kcHsSigType</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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191

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<pre style="margin: 0;">-<span id="LC191" class="line" lang="haskell"><span class="n" style="color: #333;">kcHsSigType</span> <span class="n" style="color: #333;">names</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsIB</span> <span class="p">{</span> <span class="n" style="color: #333;">hsib_body</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hs_ty</span></span>

</pre>

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192

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<pre style="margin: 0;">-<span id="LC192" class="line" lang="haskell">                                  <span class="p">,</span> <span class="n" style="color: #333;">hsib_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sig_vars</span> <span class="p">})</span></span>

</pre>

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193

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<pre style="margin: 0;">-<span id="LC193" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addSigCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">funsSigCtxt</span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="n" style="color: #333;">hs_ty</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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194

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<pre style="margin: 0;">-<span id="LC194" class="line" lang="haskell">    <span class="n" style="color: #333;">discardResult</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

195

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<pre style="margin: 0;">-<span id="LC195" class="line" lang="haskell">    <span class="n" style="color: #333;">bindImplicitTKBndrs_Skol</span> <span class="n" style="color: #333;">sig_vars</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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196

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<pre style="margin: 0;">-<span id="LC196" class="line" lang="haskell">    <span class="n" style="color: #333;">tc_lhs_type</span> <span class="n" style="color: #333;">typeLevelMode</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">liftedTypeKind</span></span>

</pre>

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197

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<pre style="margin: 0;">-<span id="LC197" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

198

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<pre style="margin: 0;">-<span id="LC198" class="line" lang="haskell"><span class="n" style="color: #333;">kcHsSigType</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsImplicitBndrs</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"kcHsSigType"</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC190" class="line" lang="haskell"><span class="n" style="color: #333;">kcClassSigType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SkolemInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="191" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC191" class="line" lang="haskell"><span class="n" style="color: #333;">kcClassSigType</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">names</span> <span class="n" style="color: #333;">sig_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC192" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">discardResult</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC193" class="line" lang="haskell">    <span class="n" style="color: #333;">tcClassSigType</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">names</span> <span class="n" style="color: #333;">sig_ty</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC194" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- tcClassSigType does a fair amount of extra work that we don't need,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC195" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- such as ordering quantified variables. But we absolutely do need</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC196" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- to push the level when checking method types and solve local equalities,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC197" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- and so it seems easier just to call tcClassSigType than selectively</span></span>

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<pre style="margin: 0;">+<span id="LC198" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- extract the lines of code from tc_hs_sig_type that we really need.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC199" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- If we don't push the level, we get #16517, where GHC accepts</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC200" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">--   class C a where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC201" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">--     meth :: forall k. Proxy (a :: k) -> ()</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC202" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Note that k is local to meth -- this is hogwash.</span></span>

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<pre style="margin: 0;"> <span id="LC203" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC204" class="line" lang="haskell"><span class="n" style="color: #333;">tcClassSigType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SkolemInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC205" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Does not do validity checking</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC206" class="line" lang="haskell"><span class="n" style="color: #333;">tcClassSigType</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">names</span> <span class="n" style="color: #333;">sig_ty</span></span>

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<pre style="margin: 0;"> <span id="LC207" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addSigCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">funsSigCtxt</span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">hsSigType</span> <span class="n" style="color: #333;">sig_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">-<span id="LC204" class="line" lang="haskell">    <span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">sig_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TheKind</span> <span class="n" style="color: #333;">liftedTypeKind</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC208" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">snd</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><$></span></span><span class="idiff right"> </span><span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">sig_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TheKind</span> <span class="n" style="color: #333;">liftedTypeKind</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC209" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Do not zonk-to-Type, nor perform a validity check</span></span>

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<pre style="margin: 0;"> <span id="LC210" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- We are in a knot with the class and associated types</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC211" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Zonking and validity checking is done by tcClassDecl</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC212" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- No need to fail here if the type has an error:</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC213" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--   If we're in the kind-checking phase, the solveEqualities</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC214" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--     in kcTyClGroup catches the error</span></span>

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<pre style="margin: 0;">+<span id="LC215" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--   If we're in the type-checking phase, the solveEqualities</span></span>

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<pre style="margin: 0;">+<span id="LC216" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--     in tcClassDecl1 gets it</span></span>

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<pre style="margin: 0;">+<span id="LC217" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Failing fast here degrades the error message in, e.g., tcfail135:</span></span>

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<pre style="margin: 0;">+<span id="LC218" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--   class Foo f where</span></span>

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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--     baa :: f a -> f</span></span>

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<pre style="margin: 0;">+<span id="LC220" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- If we fail fast, we're told that f has kind `k1` when we wanted `*`.</span></span>

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<pre style="margin: 0;">+<span id="LC221" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- It should be that f has kind `k2 -> *`, but we never get a chance</span></span>

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<pre style="margin: 0;">+<span id="LC222" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- to run the solver where the kind of f is touchable. This is</span></span>

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<pre style="margin: 0;">+<span id="LC223" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- painfully delicate.</span></span>

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<pre style="margin: 0;"> <span id="LC224" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC225" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsSigType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UserTypeCtxt</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC226" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Does validity checking</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -214,10 +230,13 @@ tcHsSigType ctxt sig_ty</td>

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<pre style="margin: 0;"> <span id="LC230" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcHsSigType {"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">sig_ty</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC231" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC232" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- Generalise here: see Note [Kind generalisation]</span></span>

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<pre style="margin: 0;">-<span id="LC217" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;"><span class="idiff left right">ty</span></span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">sig_ty</span></span>

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<pre style="margin: 0;">-<span id="LC218" class="line" lang="haskell">                                      <span class="p">(</span><span class="n" style="color: #333;">expectedKindInCtxt</span> <span class="n" style="color: #333;">ctxt</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC233" class="line" lang="haskell">       <span class="p">;</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">insol</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">sig_ty</span></span>

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<pre style="margin: 0;">+<span id="LC234" class="line" lang="haskell">                                      <span class="idiff left right"> </span><span class="p">(</span><span class="n" style="color: #333;">expectedKindInCtxt</span> <span class="n" style="color: #333;">ctxt</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC235" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcType</span> <span class="n" style="color: #333;">ty</span></span>

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<pre style="margin: 0;"> <span id="LC236" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">when</span> <span class="n" style="color: #333;">insol</span> <span class="n" style="color: #333;">failM</span></span>

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<pre style="margin: 0;">+<span id="LC238" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See Note [Fail fast if there are insoluble kind equalities] in TcSimplify</span></span>

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<pre style="margin: 0;">+<span id="LC239" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC240" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkValidType</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">ty</span></span>

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<pre style="margin: 0;"> <span id="LC241" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"end tcHsSigType }"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC242" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">ty</span> <span class="p">}</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="244" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -225,12 +244,14 @@ tcHsSigType ctxt sig_ty</td>

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<pre style="margin: 0;"> <span id="LC244" class="line" lang="haskell">    <span class="n" style="color: #333;">skol_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SigTypeSkol</span> <span class="n" style="color: #333;">ctxt</span></span>

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<pre style="margin: 0;"> <span id="LC245" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC246" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SkolemInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

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<pre style="margin: 0;">-<span id="LC228" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ContextKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Type</span></span></span>

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<td class="diff-line-num new new_line" data-linenumber="247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC247" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ContextKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Bool</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TcType</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC248" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Kind-checks/desugars an 'LHsSigType',</span></span>

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<pre style="margin: 0;"> <span id="LC249" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   solve equalities,</span></span>

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<pre style="margin: 0;"> <span id="LC250" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   and then kind-generalizes.</span></span>

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<pre style="margin: 0;"> <span id="LC251" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This will never emit constraints, as it uses solveEqualities interally.</span></span>

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<pre style="margin: 0;"> <span id="LC252" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- No validity checking or zonking</span></span>

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<pre style="margin: 0;">+<span id="LC253" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns also a Bool indicating whether the type induced an insoluble constraint;</span></span>

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<pre style="margin: 0;">+<span id="LC254" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- True <=> constraint is insoluble</span></span>

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<pre style="margin: 0;"> <span id="LC255" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">hs_sig_type</span> <span class="n" style="color: #333;">ctxt_kind</span></span>

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<pre style="margin: 0;"> <span id="LC256" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">HsIB</span> <span class="p">{</span> <span class="n" style="color: #333;">hsib_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sig_vars</span><span class="p">,</span> <span class="n" style="color: #333;">hsib_body</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hs_ty</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">hs_sig_type</span></span>

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<pre style="margin: 0;"> <span id="LC257" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">tc_lvl</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">wanted</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">spec_tkvs</span><span class="p">,</span> <span class="n" style="color: #333;">ty</span><span class="p">)))</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -238,7 +259,6 @@ tc_hs_sig_type skol_info hs_sig_type ctxt_kind</td>

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<pre style="margin: 0;"> <span id="LC259" class="line" lang="haskell">                 <span class="n" style="color: #333;">solveLocalEqualitiesX</span> <span class="s" style="color: #d14;">"tc_hs_sig_type"</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell">                 <span class="n" style="color: #333;">bindImplicitTKBndrs_Skol</span> <span class="n" style="color: #333;">sig_vars</span>      <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC261" class="line" lang="haskell">                 <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">kind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newExpectedKind</span> <span class="n" style="color: #333;">ctxt_kind</span></span>

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<pre style="margin: 0;">-<span id="LC241" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC262" class="line" lang="haskell">                    <span class="p">;</span> <span class="n" style="color: #333;">tc_lhs_type</span> <span class="n" style="color: #333;">typeLevelMode</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">kind</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC263" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Any remaining variables (unsolved in the solveLocalEqualities)</span></span>

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<pre style="margin: 0;"> <span id="LC264" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- should be in the global tyvars, and therefore won't be quantified</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="249" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="269" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -249,9 +269,11 @@ tc_hs_sig_type skol_info hs_sig_type ctxt_kind</td>

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<pre style="margin: 0;"> <span id="LC269" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">emitResidualTvConstraint</span> <span class="n" style="color: #333;">skol_info</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="p">(</span><span class="n" style="color: #333;">kvs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">spec_tkvs</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC270" class="line" lang="haskell">                                  <span class="n" style="color: #333;">tc_lvl</span> <span class="n" style="color: #333;">wanted</span></span>

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<pre style="margin: 0;"> <span id="LC271" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC272" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">insolubleWC</span> <span class="n" style="color: #333;">wanted</span><span class="p">,</span> <span class="n" style="color: #333;">mkInvForAllTys</span> <span class="n" style="color: #333;">kvs</span> <span class="n" style="color: #333;">ty1</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

273

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<pre style="margin: 0;">+<span id="LC273" class="line" lang="haskell"></span>

</pre>

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252

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<pre style="margin: 0;"> <span id="LC274" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkInvForAllTys</span> <span class="n" style="color: #333;">kvs</span> <span class="n" style="color: #333;">ty1</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="253" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

253

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275

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<pre style="margin: 0;"> <span id="LC275" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="254" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

254

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<td class="diff-line-num new_line old" data-linenumber="276" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC254" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsImplicitBndrs</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"tc_hs_sig_type<span class="idiff left right">_and_gen</span>"</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="255" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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276

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<pre style="margin: 0;">+<span id="LC276" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_sig_type</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsImplicitBndrs</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"tc_hs_sig_type"</span></span>

</pre>

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255

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277

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<pre style="margin: 0;"> <span id="LC277" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

256

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<td class="diff-line-num new_line" data-linenumber="278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

278

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<pre style="margin: 0;"> <span id="LC278" class="line" lang="haskell"><span class="n" style="color: #333;">tcTopLHsType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ContextKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

257

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<td class="diff-line-num new_line" data-linenumber="279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

279

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<pre style="margin: 0;"> <span id="LC279" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- tcTopLHsType is used for kind-checking top-level HsType where</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2056" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2056,7 +2078,8 @@ kindGeneralize :: TcType -> TcM [KindVar]</td>

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2056

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2078

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<pre style="margin: 0;"> <span id="LC2078" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Quantify the free kind variables of a kind or type</span></span>

</pre>

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2057

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<td class="diff-line-num new_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2079

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<pre style="margin: 0;"> <span id="LC2079" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- In the latter case the type is closed, so it has no free</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2058" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2058

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<td class="diff-line-num new_line" data-linenumber="2080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2080

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<pre style="margin: 0;"> <span id="LC2080" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- type variables.  So in both cases, all the free vars are kind vars</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2059" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2059

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<td class="diff-line-num new_line old" data-linenumber="2081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2059" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Input needn't be zonked.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2060" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2081

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<pre style="margin: 0;">+<span id="LC2081" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Input needn't be zonked. All variables to be quantified must</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2060" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2082

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<pre style="margin: 0;">+<span id="LC2082" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- have a TcLevel higher than the ambient TcLevel.</span></span>

</pre>

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2060

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<td class="diff-line-num new_line" data-linenumber="2083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2083

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<pre style="margin: 0;"> <span id="LC2083" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: You must call solveEqualities or solveLocalEqualities before</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2061" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2061

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<td class="diff-line-num new_line" data-linenumber="2084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2084

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<pre style="margin: 0;"> <span id="LC2084" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- kind generalization</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2062" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2062

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<td class="diff-line-num new_line" data-linenumber="2085" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2085

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<pre style="margin: 0;"> <span id="LC2085" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2074" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2097" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2074,7 +2097,8 @@ kindGeneralize kind_or_type</td>

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2074

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2097

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<pre style="margin: 0;"> <span id="LC2097" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2075" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2075

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<td class="diff-line-num new_line" data-linenumber="2098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2098

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<pre style="margin: 0;"> <span id="LC2098" class="line" lang="haskell"><span class="cd">-- | This variant of 'kindGeneralize' refuses to generalize over any</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2076" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2076

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<td class="diff-line-num new_line" data-linenumber="2099" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2099

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<pre style="margin: 0;"> <span id="LC2099" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- variables free in the given WantedConstraints. Instead, it promotes</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2077" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2077

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<pre style="margin: 0;">-<span id="LC2077" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- these variables into an outer TcLevel. See also</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2100" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2100

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<pre style="margin: 0;">+<span id="LC2100" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- these variables into an outer TcLevel. All variables to be quantified must</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2101

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<pre style="margin: 0;">+<span id="LC2101" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- have a TcLevel higher than the ambient TcLevel. See also</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2078

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<td class="diff-line-num new_line" data-linenumber="2102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2102

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<pre style="margin: 0;"> <span id="LC2102" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note [Promoting unification variables] in TcSimplify</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2079

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<td class="diff-line-num new_line" data-linenumber="2103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2103

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<pre style="margin: 0;"> <span id="LC2103" class="line" lang="haskell"><span class="n" style="color: #333;">kindGeneralizeLocal</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">WantedConstraints</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">KindVar</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2080

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<td class="diff-line-num new_line" data-linenumber="2104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2104

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<pre style="margin: 0;"> <span id="LC2104" class="line" lang="haskell"><span class="n" style="color: #333;">kindGeneralizeLocal</span> <span class="n" style="color: #333;">wanted</span> <span class="n" style="color: #333;">kind_or_type</span></span>

</pre>

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<br>

</li>

<li id="367db94fc37c8c7548dbe545a5302c7a5108e41e">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#367db94fc37c8c7548dbe545a5302c7a5108e41e"><strong>compiler/typecheck/TcMType.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="759" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="759" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -759,14 +759,14 @@ writeMetaTyVar tyvar ty</td>

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759

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<td class="diff-line-num new_line" data-linenumber="759" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

759

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<pre style="margin: 0;"> <span id="LC759" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="760" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

760

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760

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<pre style="margin: 0;"> <span id="LC760" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Everything from here on only happens if DEBUG is on</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="761" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

761

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<td class="diff-line-num new_line" data-linenumber="761" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

761

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<pre style="margin: 0;"> <span id="LC761" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isTcTyVar</span> <span class="n" style="color: #333;">tyvar</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="762" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

762

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<td class="diff-line-num new_line old" data-linenumber="762" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC762" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">WARN</span></span><span class="p"><span class="idiff">(</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Tru</span>e</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Writing to non-tc tyvar"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tyvar</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="763" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="762" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

762

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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">ASSERT2</span></span><span class="p"><span class="idiff">(</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Fals</span>e</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Writing to non-tc tyvar"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tyvar</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="763" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

763

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763

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<pre style="margin: 0;"> <span id="LC763" class="line" lang="haskell">    <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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764

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764

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<pre style="margin: 0;"> <span id="LC764" class="line" lang="haskell"></span>

</pre>

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765

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765

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<pre style="margin: 0;"> <span id="LC765" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MetaTv</span> <span class="p">{</span> <span class="n" style="color: #333;">mtv_ref</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ref</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcTyVarDetails</span> <span class="n" style="color: #333;">tyvar</span></span>

</pre>

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766

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766

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<pre style="margin: 0;"> <span id="LC766" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">writeMetaTyVarRef</span> <span class="n" style="color: #333;">tyvar</span> <span class="n" style="color: #333;">ref</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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767

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767

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<pre style="margin: 0;"> <span id="LC767" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="768" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

768

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768

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<pre style="margin: 0;"> <span id="LC768" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

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769

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<pre style="margin: 0;">-<span id="LC769" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">WARN</span></span><span class="p"><span class="idiff">(</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Tru</span>e</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Writing to non-meta tyvar"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tyvar</span> <span class="p">)</span></span>

</pre>

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769

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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">ASSERT2</span></span><span class="p"><span class="idiff">(</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Fals</span>e</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Writing to non-meta tyvar"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tyvar</span> <span class="p">)</span></span>

</pre>

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770

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770

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<pre style="margin: 0;"> <span id="LC770" class="line" lang="haskell">    <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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771

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771

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<pre style="margin: 0;"> <span id="LC771" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="772" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

772

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772

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<pre style="margin: 0;"> <span id="LC772" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------------</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1066" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1066" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1066,18 +1066,18 @@ we are trying to generalise this type:</td>

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1066

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1066

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<pre style="margin: 0;"> <span id="LC1066" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  forall arg. ... (alpha[tau]:arg) ...</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1067" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1067

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<td class="diff-line-num new_line" data-linenumber="1067" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1067

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<pre style="margin: 0;"> <span id="LC1067" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1068" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1068

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<td class="diff-line-num new_line" data-linenumber="1068" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1068

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<pre style="margin: 0;"> <span id="LC1068" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We have a metavariable alpha whose kind mentions a skolem variable</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1069" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1069

</td>

<td class="diff-line-num new_line old" data-linenumber="1069" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1069" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">bou<span class="idiff left right">dn</span> inside the very type we are generalising.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1070" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1069" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1069

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<pre style="margin: 0;">+<span id="LC1069" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">bou<span class="idiff left right">nd</span> inside the very type we are generalising.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1070" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1070

</td>

<td class="diff-line-num new_line" data-linenumber="1070" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1070

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<pre style="margin: 0;"> <span id="LC1070" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This can arise while type-checking a user-written type signature</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1071" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1071

</td>

<td class="diff-line-num new_line" data-linenumber="1071" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1071

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<pre style="margin: 0;"> <span id="LC1071" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(see the test case for the full code).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1072" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1072

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<td class="diff-line-num new_line" data-linenumber="1072" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1072

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<pre style="margin: 0;"> <span id="LC1072" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1073" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1073

</td>

<td class="diff-line-num new_line" data-linenumber="1073" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1073

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<pre style="margin: 0;"> <span id="LC1073" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We cannot generalise over alpha!  That would produce a type like</span></span>

</pre>

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1074

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1074

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<pre style="margin: 0;"> <span id="LC1074" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  forall {a :: arg}. forall arg. ...blah...</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1075" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1075

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1075

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<pre style="margin: 0;"> <span id="LC1075" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The fact that alpha's kind mentions arg renders it completely</span></span>

</pre>

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1076

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<pre style="margin: 0;">-<span id="LC1076" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">ineligible for generaliation.</span></span>

</pre>

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1076

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<pre style="margin: 0;">+<span id="LC1076" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">ineligible for generali<span class="idiff left right">s</span>ation.</span></span>

</pre>

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1077

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1077

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<pre style="margin: 0;"> <span id="LC1077" class="line" lang="haskell"></span>

</pre>

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1078

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1078

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<pre style="margin: 0;"> <span id="LC1078" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">However, we are not going to learn any new constraints on alpha,</span></span>

</pre>

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1079

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<pre style="margin: 0;">-<span id="LC1079" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">because its kind isn't even in scope in the outer context<span class="idiff left right">.  So alpha</span></span></span>

</pre>

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1080

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<pre style="margin: 0;">-<span id="LC1080" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is entirely unconstrained.</span></span>

</pre>

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1079

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<pre style="margin: 0;">+<span id="LC1079" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">because its kind isn't even in scope in the outer context<span class="idiff left right"> (but see Wrinkle).</span></span></span>

</pre>

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1080

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<pre style="margin: 0;">+<span id="LC1080" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">So alpha </span>is entirely unconstrained.</span></span>

</pre>

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1081

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1081

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<pre style="margin: 0;"> <span id="LC1081" class="line" lang="haskell"></span>

</pre>

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1082

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1082

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<pre style="margin: 0;"> <span id="LC1082" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">What then should we do with alpha?  During generalization, every</span></span>

</pre>

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1083

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1083

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<pre style="margin: 0;"> <span id="LC1083" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">metavariable is either (A) promoted, (B) generalized, or (C) zapped</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1098,6 +1098,17 @@ We do this eager zapping in candidateQTyVars, which always precedes</td>

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1098

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1098

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<pre style="margin: 0;"> <span id="LC1098" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">generalisation, because at that moment we have a clear picture of</span></span>

</pre>

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1099

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1099

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<pre style="margin: 0;"> <span id="LC1099" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">what skolems are in scope.</span></span>

</pre>

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1100

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1100

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<pre style="margin: 0;"> <span id="LC1100" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1101

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<pre style="margin: 0;">+<span id="LC1101" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Wrinkle:</span></span>

</pre>

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1102

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<pre style="margin: 0;">+<span id="LC1102" class="line" lang="haskell"></span>

</pre>

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1103

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<pre style="margin: 0;">+<span id="LC1103" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We must make absolutely sure that alpha indeed is not</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1104

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<pre style="margin: 0;">+<span id="LC1104" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">from an outer context. (Otherwise, we might indeed learn more information</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1105

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<pre style="margin: 0;">+<span id="LC1105" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">about it.) This can be done easily: we just check alpha's TcLevel.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1106" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1106

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<pre style="margin: 0;">+<span id="LC1106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">That level must be strictly greater than the ambient TcLevel in order</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1107

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<pre style="margin: 0;">+<span id="LC1107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to treat it as naughty. We say "strictly greater than" because the call to</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1108

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<pre style="margin: 0;">+<span id="LC1108" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">candidateQTyVars is made outside the bumped TcLevel, as stated in the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1109

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<pre style="margin: 0;">+<span id="LC1109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">comment to candidateQTyVarsOfType. The level check is done in go_tv</span></span>

</pre>

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1110

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<pre style="margin: 0;">+<span id="LC1110" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in collect_cant_qtvs. Skipping this check caused #16517.</span></span>

</pre>

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1111

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<pre style="margin: 0;">+<span id="LC1111" class="line" lang="haskell"></span>

</pre>

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1101

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<td class="diff-line-num new_line" data-linenumber="1112" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1112

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<pre style="margin: 0;"> <span id="LC1112" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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1102

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1113

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<pre style="margin: 0;"> <span id="LC1113" class="line" lang="haskell"></span>

</pre>

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1103

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1114

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<pre style="margin: 0;"> <span id="LC1114" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">CandidatesQTvs</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1156" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1145,13 +1156,17 @@ candidateKindVars dvs = dVarSetToVarSet (dv_kvs dvs)</td>

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1145

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1156

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<pre style="margin: 0;"> <span id="LC1156" class="line" lang="haskell"><span class="cd">-- | Gathers free variables to use as quantification candidates (in</span></span>

</pre>

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1146

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<td class="diff-line-num new_line" data-linenumber="1157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1157" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'quantifyTyVars'). This might output the same var</span></span>

</pre>

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1147

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<td class="diff-line-num new_line" data-linenumber="1158" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1158

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<pre style="margin: 0;"> <span id="LC1158" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- in both sets, if it's used in both a type and a kind.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1159" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1159

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<pre style="margin: 0;">+<span id="LC1159" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The variables to quantify must have a TcLevel strictly greater than</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1160" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1160

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<pre style="margin: 0;">+<span id="LC1160" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the ambient level. (See Wrinkle in Note [Naughty quantification candidates])</span></span>

</pre>

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1148

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<td class="diff-line-num new_line" data-linenumber="1161" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1161

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<pre style="margin: 0;"> <span id="LC1161" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [CandidatesQTvs determinism and order]</span></span>

</pre>

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1149

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<td class="diff-line-num new_line" data-linenumber="1162" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1162

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<pre style="margin: 0;"> <span id="LC1162" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Dependent type variables]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1150" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1150

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<td class="diff-line-num new_line" data-linenumber="1163" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1163

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<pre style="margin: 0;"> <span id="LC1163" class="line" lang="haskell"><span class="n" style="color: #333;">candidateQTyVarsOfType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span>       <span class="c1" style="color: #998; font-style: italic;">-- not necessarily zonked</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1151" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1151

</td>

<td class="diff-line-num new_line" data-linenumber="1164" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1164

</td>

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<pre style="margin: 0;"> <span id="LC1164" class="line" lang="haskell">                       <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">CandidatesQTvs</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1152" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1152

</td>

<td class="diff-line-num new_line" data-linenumber="1165" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1165

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<pre style="margin: 0;"> <span id="LC1165" class="line" lang="haskell"><span class="n" style="color: #333;">candidateQTyVarsOfType</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collect_cand_qtvs</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">mempty</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1153

</td>

<td class="diff-line-num new_line" data-linenumber="1166" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1166

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1166" class="line" lang="haskell"></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1154

</td>

<td class="diff-line-num new_line old" data-linenumber="1167" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1154" class="line" lang="haskell"><span class="cd">-- | Like 'splitDepVarsOfType', but over a list of types</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1167" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1167

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1167" class="line" lang="haskell"><span class="cd">-- | Like 'candidateQTyVarsOfType', but over a list of types</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1168" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1168

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1168" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The variables to quantify must have a TcLevel strictly greater than</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1169

</td>

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<pre style="margin: 0;">+<span id="LC1169" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the ambient level. (See Wrinkle in Note [Naughty quantification candidates])</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1155

</td>

<td class="diff-line-num new_line" data-linenumber="1170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1170

</td>

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<pre style="margin: 0;"> <span id="LC1170" class="line" lang="haskell"><span class="n" style="color: #333;">candidateQTyVarsOfTypes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">CandidatesQTvs</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1156" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1156

</td>

<td class="diff-line-num new_line" data-linenumber="1171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1171

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<pre style="margin: 0;"> <span id="LC1171" class="line" lang="haskell"><span class="n" style="color: #333;">candidateQTyVarsOfTypes</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldlM</span> <span class="p">(</span><span class="n" style="color: #333;">collect_cand_qtvs</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">emptyVarSet</span><span class="p">)</span> <span class="n" style="color: #333;">mempty</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1157

</td>

<td class="diff-line-num new_line" data-linenumber="1172" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1172

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1172" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder match" id="" style="line-height: 1.6;">

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1175,7 +1190,7 @@ delCandidates (DV { dv_kvs = kvs, dv_tvs = tvs, dv_cvs = cvs }) vars</td>

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<td class="diff-line-num old_line" data-linenumber="1175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1175

</td>

<td class="diff-line-num new_line" data-linenumber="1190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1190

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1190" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1176

</td>

<td class="diff-line-num new_line" data-linenumber="1191" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1191

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1191" class="line" lang="haskell"><span class="n" style="color: #333;">collect_cand_qtvs</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1177

</td>

<td class="diff-line-num new_line" data-linenumber="1192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1192

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1192" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span>            <span class="c1" style="color: #998; font-style: italic;">-- True <=> consider every fv in Type to be dependent</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1178

</td>

<td class="diff-line-num new_line old" data-linenumber="1193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1178" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span>          <span class="c1" style="color: #998; font-style: italic;">-- Bound variables (<span class="idiff left right">both locally bound and globally bound</span>)</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1193

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<pre style="margin: 0;">+<span id="LC1193" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span>          <span class="c1" style="color: #998; font-style: italic;">-- Bound variables (<span class="idiff left right">locals only</span>)</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1179

</td>

<td class="diff-line-num new_line" data-linenumber="1194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1194

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1194" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CandidatesQTvs</span>  <span class="c1" style="color: #998; font-style: italic;">-- Accumulating parameter</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1180

</td>

<td class="diff-line-num new_line" data-linenumber="1195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1195

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1195" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>            <span class="c1" style="color: #998; font-style: italic;">-- Not necessarily zonked</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1181" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1181

</td>

<td class="diff-line-num new_line" data-linenumber="1196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1196

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<pre style="margin: 0;"> <span id="LC1196" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">CandidatesQTvs</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1235" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1220,16 +1235,26 @@ collect_cand_qtvs is_dep bound dvs ty</td>

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<td class="diff-line-num old_line" data-linenumber="1220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1220

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1235

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<pre style="margin: 0;"> <span id="LC1235" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1221

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<td class="diff-line-num new_line" data-linenumber="1236" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1236

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<pre style="margin: 0;"> <span id="LC1236" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-----------------</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1222

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<td class="diff-line-num new_line" data-linenumber="1237" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1237

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<pre style="margin: 0;"> <span id="LC1237" class="line" lang="haskell">    <span class="n" style="color: #333;">go_tv</span> <span class="n" style="color: #333;">dv</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DV</span> <span class="p">{</span> <span class="n" style="color: #333;">dv_kvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">kvs</span><span class="p">,</span> <span class="n" style="color: #333;">dv_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span> <span class="p">})</span> <span class="n" style="color: #333;">tv</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1223" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1223

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<td class="diff-line-num new_line old" data-linenumber="1238" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1223" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tv</span> <span class="p">`</span><span class="n" style="color: #333;">elemDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">kvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">dv</span>  <span class="c1" style="color: #998; font-style: italic;">-- We have met this tyvar aleady</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1238" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1238

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<pre style="margin: 0;">+<span id="LC1238" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tv</span> <span class="p">`</span><span class="n" style="color: #333;">elemDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">kvs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1239" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1239

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<pre style="margin: 0;">+<span id="LC1239" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">dv</span>  <span class="c1" style="color: #998; font-style: italic;">-- We have met this tyvar aleady</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1240" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1240

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<pre style="margin: 0;">+<span id="LC1240" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1224

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<td class="diff-line-num new_line" data-linenumber="1241" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1241

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<pre style="margin: 0;"> <span id="LC1241" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">is_dep</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1225

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<td class="diff-line-num new_line old" data-linenumber="1242" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1225" class="line" lang="haskell">      <span class="p">,</span> <span class="n" style="color: #333;">tv</span> <span class="p">`</span><span class="n" style="color: #333;">elemDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">dv</span>  <span class="c1" style="color: #998; font-style: italic;">-- We have met this tyvar aleady</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1242" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1242

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<pre style="margin: 0;">+<span id="LC1242" class="line" lang="haskell">      <span class="p">,</span> <span class="n" style="color: #333;">tv</span> <span class="p">`</span><span class="n" style="color: #333;">elemDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tvs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1243" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1243

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<pre style="margin: 0;">+<span id="LC1243" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">dv</span>  <span class="c1" style="color: #998; font-style: italic;">-- We have met this tyvar aleady</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1244" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1244

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<pre style="margin: 0;">+<span id="LC1244" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1226

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<td class="diff-line-num new_line" data-linenumber="1245" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1245

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<pre style="margin: 0;"> <span id="LC1245" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1227" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1227

</td>

<td class="diff-line-num new_line" data-linenumber="1246" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1246

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<pre style="margin: 0;"> <span id="LC1246" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">tv_kind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcType</span> <span class="p">(</span><span class="n" style="color: #333;">tyVarKind</span> <span class="n" style="color: #333;">tv</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1228" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1228

</td>

<td class="diff-line-num new_line" data-linenumber="1247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1247

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<pre style="margin: 0;"> <span id="LC1247" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- This zonk is annoying, but it is necessary, both to</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1229

</td>

<td class="diff-line-num new_line" data-linenumber="1248" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1248

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<pre style="margin: 0;"> <span id="LC1248" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- ensure that the collected candidates have zonked kinds</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1230" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1230

</td>

<td class="diff-line-num new_line" data-linenumber="1249" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1249

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<pre style="margin: 0;"> <span id="LC1249" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- (Trac #15795) and to make the naughty check</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1231" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1231

</td>

<td class="diff-line-num new_line" data-linenumber="1250" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1250

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<pre style="margin: 0;"> <span id="LC1250" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- (which comes next) works correctly</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1232" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1232

</td>

<td class="diff-line-num new_line old" data-linenumber="1251" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1232" class="line" lang="haskell">           <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">intersectsVarSet</span> <span class="n" style="color: #333;">bound</span> <span class="p">(</span><span class="n" style="color: #333;">tyCoVarsOfType</span> <span class="n" style="color: #333;">tv_kind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1251" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1251

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<pre style="margin: 0;">+<span id="LC1251" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1252" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1252

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<pre style="margin: 0;">+<span id="LC1252" class="line" lang="haskell">           <span class="p">;</span> <span class="n" style="color: #333;">cur_lvl</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getTcLevel</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1253" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1253

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<pre style="margin: 0;">+<span id="LC1253" class="line" lang="haskell">           <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">tcTyVarLevel</span> <span class="n" style="color: #333;">tv</span> <span class="p">`</span><span class="n" style="color: #333;">strictlyDeeperThan</span><span class="p">`</span> <span class="n" style="color: #333;">cur_lvl</span> <span class="o" style="font-weight: 600;">&&</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1254" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1254

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<pre style="margin: 0;">+<span id="LC1254" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- this tyvar is from an outer context: see Wrinkle</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1255" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1255

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<pre style="margin: 0;">+<span id="LC1255" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- in Note [Naughty quantification candidates]</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1256

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1256" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1257

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<pre style="margin: 0;">+<span id="LC1257" class="line" lang="haskell">                <span class="n" style="color: #333;">intersectsVarSet</span> <span class="n" style="color: #333;">bound</span> <span class="p">(</span><span class="n" style="color: #333;">tyCoVarsOfType</span> <span class="n" style="color: #333;">tv_kind</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1233

</td>

<td class="diff-line-num new_line" data-linenumber="1258" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1258

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<pre style="margin: 0;"> <span id="LC1258" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1234" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1234

</td>

<td class="diff-line-num new_line" data-linenumber="1259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1259

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<pre style="margin: 0;"> <span id="LC1259" class="line" lang="haskell">             <span class="kr" style="font-weight: 600;">then</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Naughty quantification candidates]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1235" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1235

</td>

<td class="diff-line-num new_line" data-linenumber="1260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1260

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<pre style="margin: 0;"> <span id="LC1260" class="line" lang="haskell">                  <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"Zapping naughty quantifier"</span> <span class="p">(</span><span class="n" style="color: #333;">pprTyVar</span> <span class="n" style="color: #333;">tv</span><span class="p">)</span></span>

</pre>

</td>

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<br>

</li>

<li id="2799ba786adc98d485fad6003334b913a0069bdc">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#2799ba786adc98d485fad6003334b913a0069bdc"><strong>compiler/typecheck/TcRnDriver.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2427,12 +2427,13 @@ tcRnType hsc_env normalise rdr_type</td>

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<td class="diff-line-num old_line" data-linenumber="2427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2427

</td>

<td class="diff-line-num new_line" data-linenumber="2427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2427

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<pre style="margin: 0;"> <span id="LC2427" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- It can have any rank or kind</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2428" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2428

</td>

<td class="diff-line-num new_line" data-linenumber="2428" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2428

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<pre style="margin: 0;"> <span id="LC2428" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- First bring into scope any wildcards</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2429" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2429

</td>

<td class="diff-line-num new_line" data-linenumber="2429" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2429

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<pre style="margin: 0;"> <span id="LC2429" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcRnType"</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">wcs</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_type</span><span class="p">])</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2430" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2430

</td>

<td class="diff-line-num new_line old" data-linenumber="2430" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2430" class="line" lang="haskell">       <span class="p">;</span> <span class="p">((</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">kind</span><span class="p">),</span> <span class="n" style="color: #333;">lie</span><span class="p">)</span>  <span class="o" style="font-weight: 600;"><-</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2431" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2431

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<pre style="margin: 0;">-<span id="LC2431" class="line" lang="haskell">                       <span class="n" style="color: #333;">captureConstraints</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2430" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2430

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<pre style="margin: 0;">+<span id="LC2430" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushTcLevelM_</span>         <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2431" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2431

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<pre style="margin: 0;">+<span id="LC2431" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- must push level to satisfy level precondition of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2432

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<pre style="margin: 0;">+<span id="LC2432" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- kindGeneralize, below</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2433" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2433

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<pre style="margin: 0;">+<span id="LC2433" class="line" lang="haskell">                       <span class="n" style="color: #333;">solveEqualities</span>       <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2432

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<td class="diff-line-num new_line" data-linenumber="2434" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2434

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<pre style="margin: 0;"> <span id="LC2434" class="line" lang="haskell">                       <span class="n" style="color: #333;">tcWildCardBinders</span> <span class="n" style="color: #333;">wcs</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">wcs'</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2433" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2433

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<td class="diff-line-num new_line" data-linenumber="2435" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2435

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<pre style="margin: 0;"> <span id="LC2435" class="line" lang="haskell">                       <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">emitWildCardHoleConstraints</span> <span class="n" style="color: #333;">wcs'</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2434" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2434

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<td class="diff-line-num new_line" data-linenumber="2436" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2436

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<pre style="margin: 0;"> <span id="LC2436" class="line" lang="haskell">                          <span class="p">;</span> <span class="n" style="color: #333;">tcLHsTypeUnsaturated</span> <span class="n" style="color: #333;">rn_type</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2435" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2435

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<td class="diff-line-num new_line old" data-linenumber="2437" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2435" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">checkNoErrs</span> <span class="p">(</span><span class="n" style="color: #333;">simplifyInteractive</span> <span class="n" style="color: #333;">lie</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2436" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2436

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<td class="diff-line-num new_line" data-linenumber="2437" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2437

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<pre style="margin: 0;"> <span id="LC2437" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2437" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2437

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<td class="diff-line-num new_line" data-linenumber="2438" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2438

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<pre style="margin: 0;"> <span id="LC2438" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Do kind generalisation; see Note [Kind-generalise in tcRnType]</span></span>

</pre>

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2438

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<td class="diff-line-num new_line" data-linenumber="2439" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2439

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<pre style="margin: 0;"> <span id="LC2439" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcType</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

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<br>

</li>

<li id="d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813"><strong>compiler/typecheck/TcRnTypes.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2095" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2095" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2095,6 +2095,16 @@ see dropDerivedWC.  For example</td>

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2095

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2095

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<pre style="margin: 0;"> <span id="LC2095" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   [D] Int ~ Bool, and we don't want to report that because it's</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2096" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2096

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<td class="diff-line-num new_line" data-linenumber="2096" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2096

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<pre style="margin: 0;"> <span id="LC2096" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   incomprehensible. That is why we don't rewrite wanteds with wanteds!</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2097" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2097

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<td class="diff-line-num new_line" data-linenumber="2097" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2097

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<pre style="margin: 0;"> <span id="LC2097" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2098

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<pre style="margin: 0;">+<span id="LC2098" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * We might float out some Wanteds from an implication, leaving behind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2099" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2099

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<pre style="margin: 0;">+<span id="LC2099" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   their insoluble Deriveds. For example:</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2100" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2100

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<pre style="margin: 0;">+<span id="LC2100" class="line" lang="haskell"></span>

</pre>

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2101

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<pre style="margin: 0;">+<span id="LC2101" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   forall a[2]. [W] alpha[1] ~ Int</span></span>

</pre>

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</td>

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2102

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<pre style="margin: 0;">+<span id="LC2102" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                [W] alpha[1] ~ Bool</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2103

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<pre style="margin: 0;">+<span id="LC2103" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                [D] Int ~ Bool</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2104

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<pre style="margin: 0;">+<span id="LC2104" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2105

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<pre style="margin: 0;">+<span id="LC2105" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   The Derived is insoluble, but we very much want to drop it when floating</span></span>

</pre>

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2106

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<pre style="margin: 0;">+<span id="LC2106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   out.</span></span>

</pre>

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2107

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<pre style="margin: 0;">+<span id="LC2107" class="line" lang="haskell"></span>

</pre>

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2098

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2108

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<pre style="margin: 0;"> <span id="LC2108" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But (tiresomely) we do keep *some* Derived constraints:</span></span>

</pre>

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2099

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<td class="diff-line-num new_line" data-linenumber="2109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2109

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<pre style="margin: 0;"> <span id="LC2109" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2100" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2100

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<td class="diff-line-num new_line" data-linenumber="2110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2110

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<pre style="margin: 0;"> <span id="LC2110" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * Type holes are derived constraints, because they have no evidence</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2103,8 +2113,7 @@ But (tiresomely) we do keep *some* Derived constraints:</td>

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2103

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<td class="diff-line-num new_line" data-linenumber="2113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2113

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<pre style="margin: 0;"> <span id="LC2113" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * Insoluble kind equalities (e.g. [D] * ~ (* -> *)), with</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2104

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<td class="diff-line-num new_line" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2114

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<pre style="margin: 0;"> <span id="LC2114" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   KindEqOrigin, may arise from a type equality a ~ Int#, say.  See</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2105

</td>

<td class="diff-line-num new_line" data-linenumber="2115" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2115

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<pre style="margin: 0;"> <span id="LC2115" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Note [Equalities with incompatible kinds] in TcCanonical.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2106" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2106

</td>

<td class="diff-line-num new_line old" data-linenumber="2116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   These need to be kept because the kind equalities might have different</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2107

</td>

<td class="diff-line-num new_line old" data-linenumber="2116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   source locations and hence different error messages.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2116

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<pre style="margin: 0;">+<span id="LC2116" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Keeping these around produces better error messages, in practice.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2108

</td>

<td class="diff-line-num new_line" data-linenumber="2117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2117

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<pre style="margin: 0;"> <span id="LC2117" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   E.g., test case dependent/should_fail/T11471</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2109

</td>

<td class="diff-line-num new_line" data-linenumber="2118" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2118

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<pre style="margin: 0;"> <span id="LC2118" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2110

</td>

<td class="diff-line-num new_line" data-linenumber="2119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2119

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<pre style="margin: 0;"> <span id="LC2119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * We keep most derived equalities arising from functional dependencies</span></span>

</pre>

</td>

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<br>

</li>

<li id="75d517f701402b106e4d98d255eb24b57ba72aab">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#75d517f701402b106e4d98d255eb24b57ba72aab"><strong>compiler/typecheck/TcSimplify.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -152,8 +152,26 @@ solveLocalEqualities :: String -> TcM a -> TcM a</td>

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<pre style="margin: 0;"> <span id="LC152" class="line" lang="haskell"><span class="n" style="color: #333;">solveLocalEqualities</span> <span class="n" style="color: #333;">callsite</span> <span class="n" style="color: #333;">thing_inside</span></span>

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<pre style="margin: 0;"> <span id="LC153" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">wanted</span><span class="p">,</span> <span class="n" style="color: #333;">res</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">solveLocalEqualitiesX</span> <span class="n" style="color: #333;">callsite</span> <span class="n" style="color: #333;">thing_inside</span></span>

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<pre style="margin: 0;"> <span id="LC154" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">emitConstraints</span> <span class="n" style="color: #333;">wanted</span></span>

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<pre style="margin: 0;">+<span id="LC155" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC156" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See Note [Fail fast if there are insoluble kind equalities]</span></span>

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<pre style="margin: 0;">+<span id="LC157" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">insolubleWC</span> <span class="n" style="color: #333;">wanted</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">+<span id="LC158" class="line" lang="haskell">           <span class="n" style="color: #333;">failM</span></span>

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<pre style="margin: 0;">+<span id="LC159" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC160" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">res</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC161" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC162" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Fail fast if there are insoluble kind equalities]</span></span>

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<pre style="margin: 0;">+<span id="LC163" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Rather like in simplifyInfer, fail fast if there is an insoluble</span></span>

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">constraint.  Otherwise we'll just succeed in kind-checking a nonsense</span></span>

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">type, with a cascade of follow-up errors.</span></span>

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For example polykinds/T12593, T15577, and many others.</span></span>

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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Take care to ensure that you emit the insoluble constraints before</span></span>

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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">failing, because they are what will ulimately lead to the error</span></span>

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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">messsage!</span></span>

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell"><span class="n" style="color: #333;">solveLocalEqualitiesX</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">WantedConstraints</span><span class="p">,</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC176" class="line" lang="haskell"><span class="n" style="color: #333;">solveLocalEqualitiesX</span> <span class="n" style="color: #333;">callsite</span> <span class="n" style="color: #333;">thing_inside</span></span>

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<pre style="margin: 0;"> <span id="LC177" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"solveLocalEqualitiesX {"</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Called from"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="n" style="color: #333;">callsite</span> <span class="p">])</span></span>

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<br>

</li>

<li id="bdfa0cc139f61d1236abc1598c5d684b43c357f9">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#bdfa0cc139f61d1236abc1598c5d684b43c357f9"><strong>compiler/typecheck/TcTyClsDecls.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -542,10 +542,15 @@ generaliseTcTyCon tc</td>

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<pre style="margin: 0;"> <span id="LC542" class="line" lang="haskell">             <span class="n" style="color: #333;">tc_res_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConResKind</span> <span class="n" style="color: #333;">tc</span></span>

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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell">             <span class="n" style="color: #333;">tc_tvs</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConTyVars</span>  <span class="n" style="color: #333;">tc</span></span>

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<pre style="margin: 0;"> <span id="LC544" class="line" lang="haskell">             <span class="n" style="color: #333;">user_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcTyConUserTyVars</span> <span class="n" style="color: #333;">tc</span>  <span class="c1" style="color: #998; font-style: italic;">-- ToDo: nuke</span></span>

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<pre style="margin: 0;">+<span id="LC545" class="line" lang="haskell">             <span class="n" style="color: #333;">spec_req_prs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcTyConScopedTyVars</span> <span class="n" style="color: #333;">tc</span></span>

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<pre style="margin: 0;"> <span id="LC546" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC546" class="line" lang="haskell">             <span class="p">(</span><span class="n" style="color: #333;">scoped_tv_names</span><span class="p">,</span> <span class="n" style="color: #333;">scoped_tvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unzip</span> <span class="p">(</span><span class="n" style="color: #333;">tcTyConScopedTyVars</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC547" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- NB: scoped_tvs includes both specified and required (tc_tvs)</span></span>

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<pre style="margin: 0;">-<span id="LC548" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- ToDo: Is this a good idea?</span></span>

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<pre style="margin: 0;">+<span id="LC547" class="line" lang="haskell">             <span class="p">(</span><span class="n" style="color: #333;">spec_req_names</span><span class="p">,</span> <span class="n" style="color: #333;">spec_req_tvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unzip</span> <span class="n" style="color: #333;">spec_req_prs</span></span>

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<pre style="margin: 0;">+<span id="LC548" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- NB: spec_req_tvs includes both Specified and Required</span></span>

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<pre style="margin: 0;">+<span id="LC549" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- Running example in Note [Inferring kinds for type declarations]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="550" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC550" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">--    spec_req_prs = [ ("k1",kk1), ("a", (aa::kk1))</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC551" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">--                   , ("k2",kk2), ("x", (xx::kk2))]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC552" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- where "k1" dnotes the Name k1, and kk1, aa, etc are MetaTyVars,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC553" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- specifically TyVarTvs</span></span>

</pre>

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549

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<pre style="margin: 0;"> <span id="LC554" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC555" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Step 1: find all the variables we want to quantify over,</span></span>

</pre>

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551

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<td class="diff-line-num new_line" data-linenumber="556" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

556

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<pre style="margin: 0;"> <span id="LC556" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">--         including Inferred, Specfied, and Required</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1038" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1043" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1038,9 +1043,11 @@ kcTyClDecl (ClassDecl { tcdLName = (dL->L _ name)</td>

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<pre style="margin: 0;"> <span id="LC1043" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsContext</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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1044

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<pre style="margin: 0;"> <span id="LC1044" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">mapM_</span> <span class="p">(</span><span class="n" style="color: #333;">wrapLocM_</span> <span class="n" style="color: #333;">kc_sig</span><span class="p">)</span> <span class="n" style="color: #333;">sigs</span> <span class="p">}</span></span>

</pre>

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1045

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<pre style="margin: 0;"> <span id="LC1045" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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1041

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<pre style="margin: 0;">-<span id="LC1041" class="line" lang="haskell">    <span class="n" style="color: #333;">kc_sig</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ClassOpSig</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">nms</span> <span class="n" style="color: #333;">op_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">kc<span class="idiff left right">HsSigType</span></span> <span class="n" style="color: #333;">nms</span> <span class="n" style="color: #333;">op_ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1046" class="line" lang="haskell">    <span class="n" style="color: #333;">kc_sig</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ClassOpSig</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">nms</span> <span class="n" style="color: #333;">op_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">kc<span class="idiff left">ClassSigType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">skol_info</span></span> <span class="n" style="color: #333;">nms</span> <span class="n" style="color: #333;">op_ty</span></span>

</pre>

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1042

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1047

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<pre style="margin: 0;"> <span id="LC1047" class="line" lang="haskell">    <span class="n" style="color: #333;">kc_sig</span> <span class="kr" style="font-weight: 600;">_</span>                          <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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1043

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<td class="diff-line-num new_line" data-linenumber="1048" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1048

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<pre style="margin: 0;"> <span id="LC1048" class="line" lang="haskell"></span>

</pre>

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1049

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<pre style="margin: 0;">+<span id="LC1049" class="line" lang="haskell">    <span class="n" style="color: #333;">skol_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TyConSkol</span> <span class="kt" style="color: #458; font-weight: 600;">ClassFlavour</span> <span class="n" style="color: #333;">name</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1050" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1050

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<pre style="margin: 0;">+<span id="LC1050" class="line" lang="haskell"></span>

</pre>

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1044

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<td class="diff-line-num new_line" data-linenumber="1051" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1051

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<pre style="margin: 0;"> <span id="LC1051" class="line" lang="haskell"><span class="n" style="color: #333;">kcTyClDecl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FamDecl</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FamilyDecl</span> <span class="p">{</span> <span class="n" style="color: #333;">fdLName</span>  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">dL</span><span class="o" style="font-weight: 600;">-></span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">fam_tc_name</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1045" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1045

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1052

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<pre style="margin: 0;"> <span id="LC1052" class="line" lang="haskell">                                  <span class="p">,</span> <span class="n" style="color: #333;">fdInfo</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fd_info</span> <span class="p">}))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1046" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1046

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<td class="diff-line-num new_line" data-linenumber="1053" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1053

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<pre style="margin: 0;"> <span id="LC1053" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- closed type families look at their equations, but other families don't</span></span>

</pre>

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<br>

</li>

<li id="341fd962c5f2c9fcf8be3dbdaa9a14ee1538af07">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#341fd962c5f2c9fcf8be3dbdaa9a14ee1538af07"><strong>compiler/typecheck/TcType.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="516" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="516" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -516,6 +516,17 @@ superSkolemTv   = SkolemTv topTcLevel True   -- Treat this as a completely disti</td>

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516

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516

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<pre style="margin: 0;"> <span id="LC516" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- The choice of level number here is a bit dodgy, but</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="517" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

517

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<td class="diff-line-num new_line" data-linenumber="517" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

517

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<pre style="margin: 0;"> <span id="LC517" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- topTcLevel works in the places that vanillaSkolemTv is used</span></span>

</pre>

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518

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<td class="diff-line-num new_line" data-linenumber="518" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

518

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<pre style="margin: 0;"> <span id="LC518" class="line" lang="haskell"></span>

</pre>

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519

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<pre style="margin: 0;">+<span id="LC519" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVarDetails</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="520" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

520

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<pre style="margin: 0;">+<span id="LC520" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprTcTyVarDetails</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="521" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

521

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<pre style="margin: 0;">+<span id="LC521" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="519" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

522

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<pre style="margin: 0;">+<span id="LC522" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVarDetails</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="523" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

523

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<pre style="margin: 0;">+<span id="LC523" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For debugging</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="524" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

524

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<pre style="margin: 0;">+<span id="LC524" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RuntimeUnk</span> <span class="p">{})</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"rt"</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="525" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

525

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<pre style="margin: 0;">+<span id="LC525" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SkolemTv</span> <span class="n" style="color: #333;">lvl</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"ssk"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lvl</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="526" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

526

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<pre style="margin: 0;">+<span id="LC526" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SkolemTv</span> <span class="n" style="color: #333;">lvl</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"sk"</span>  <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lvl</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC527" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MetaTv</span> <span class="p">{</span> <span class="n" style="color: #333;">mtv_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">info</span><span class="p">,</span> <span class="n" style="color: #333;">mtv_tclvl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tclvl</span> <span class="p">})</span></span>

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<td class="diff-line-num new new_line" data-linenumber="528" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC528" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tclvl</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="529" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

529

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<pre style="margin: 0;">+<span id="LC529" class="line" lang="haskell"></span>

</pre>

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519

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<pre style="margin: 0;"> <span id="LC530" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------</span></span>

</pre>

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520

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<td class="diff-line-num new_line" data-linenumber="531" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

531

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<pre style="margin: 0;"> <span id="LC531" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">MetaDetails</span></span>

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521

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<td class="diff-line-num new_line" data-linenumber="532" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC532" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Flexi</span>  <span class="c1" style="color: #998; font-style: italic;">-- Flexi type variables unify to become Indirects</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="555" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -544,20 +555,11 @@ instance Outputable MetaDetails where</td>

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<td class="diff-line-num new_line" data-linenumber="555" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC555" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">Flexi</span>         <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Flexi"</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC556" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Indirect</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Indirect"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC557" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="547" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC547" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVarDetails</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

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<pre style="margin: 0;">-<span id="LC548" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For debugging</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="549" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

549

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<pre style="margin: 0;">-<span id="LC549" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RuntimeUnk</span> <span class="p">{})</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"rt"</span></span>

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550

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<pre style="margin: 0;">-<span id="LC550" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SkolemTv</span> <span class="n" style="color: #333;">lvl</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"ssk"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lvl</span></span>

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<pre style="margin: 0;">-<span id="LC551" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SkolemTv</span> <span class="n" style="color: #333;">lvl</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"sk"</span>  <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lvl</span></span>

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552

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<pre style="margin: 0;">-<span id="LC552" class="line" lang="haskell"><span class="n" style="color: #333;">pprTcTyVarDetails</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MetaTv</span> <span class="p">{</span> <span class="n" style="color: #333;">mtv_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">info</span><span class="p">,</span> <span class="n" style="color: #333;">mtv_tclvl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tclvl</span> <span class="p">})</span></span>

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<pre style="margin: 0;">-<span id="LC553" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp_info</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tclvl</span></span>

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554

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<pre style="margin: 0;">-<span id="LC554" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="555" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

555

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<td class="diff-line-num new_line old" data-linenumber="558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC555" class="line" lang="haskell">    <span class="n" style="color: #333;">pp_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">info</span> <span class="kr" style="font-weight: 600;">of</span></span>

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556

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<td class="diff-line-num new_line old" data-linenumber="558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC556" class="line" lang="haskell">                <span class="kt" style="color: #458; font-weight: 600;">TauTv</span>      <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"tau"</span></span>

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557

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<td class="diff-line-num new_line old" data-linenumber="558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC557" class="line" lang="haskell">                <span class="kt" style="color: #458; font-weight: 600;">TyVarTv</span>    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"tyv"</span></span>

</pre>

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558

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<td class="diff-line-num new_line old" data-linenumber="558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC558" class="line" lang="haskell">                <span class="kt" style="color: #458; font-weight: 600;">FlatMetaTv</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"fmv"</span></span>

</pre>

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559

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<td class="diff-line-num new_line old" data-linenumber="558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC559" class="line" lang="haskell">                <span class="kt" style="color: #458; font-weight: 600;">FlatSkolTv</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"fsk"</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC560" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC558" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">MetaInfo</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="559" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC559" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">TauTv</span>         <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"tau"</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="560" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC560" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">TyVarTv</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"tyv"</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="561" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC561" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">FlatMetaTv</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"fmv"</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="562" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC562" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">FlatSkolTv</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"fsk"</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC563" class="line" lang="haskell"></span>

</pre>

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564

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<pre style="margin: 0;"> <span id="LC564" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC565" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -795,10 +797,10 @@ checkTcLevelInvariant :: TcLevel -> TcLevel -> Bool</td>

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<pre style="margin: 0;"> <span id="LC797" class="line" lang="haskell"><span class="n" style="color: #333;">checkTcLevelInvariant</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcLevel</span> <span class="n" style="color: #333;">ctxt_tclvl</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcLevel</span> <span class="n" style="color: #333;">tv_tclvl</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC798" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ctxt_tclvl</span> <span class="o" style="font-weight: 600;">>=</span> <span class="n" style="color: #333;">tv_tclvl</span></span>

</pre>

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797

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<td class="diff-line-num new_line" data-linenumber="799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

799

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<pre style="margin: 0;"> <span id="LC799" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="798" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="800" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

800

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<pre style="margin: 0;">+<span id="LC800" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns topTcLevel for non-TcTyVars</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="798" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

798

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<td class="diff-line-num new_line" data-linenumber="801" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

801

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<pre style="margin: 0;"> <span id="LC801" class="line" lang="haskell"><span class="n" style="color: #333;">tcTyVarLevel</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcLevel</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

799

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<td class="diff-line-num new_line" data-linenumber="802" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

802

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<pre style="margin: 0;"> <span id="LC802" class="line" lang="haskell"><span class="n" style="color: #333;">tcTyVarLevel</span> <span class="n" style="color: #333;">tv</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="800" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

800

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<td class="diff-line-num new_line old" data-linenumber="803" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC800" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">tcIsTcTyVar</span> <span class="n" style="color: #333;">tv</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tv</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="801" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

801

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<td class="diff-line-num new_line old" data-linenumber="803" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC801" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tcTyVarDetails</span> <span class="n" style="color: #333;">tv</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="802" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="803" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

803

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<pre style="margin: 0;">+<span id="LC803" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tcTyVarDetails</span> <span class="n" style="color: #333;">tv</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="802" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

802

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<td class="diff-line-num new_line" data-linenumber="804" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

804

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<pre style="margin: 0;"> <span id="LC804" class="line" lang="haskell">          <span class="kt" style="color: #458; font-weight: 600;">MetaTv</span> <span class="p">{</span> <span class="n" style="color: #333;">mtv_tclvl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tv_lvl</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">tv_lvl</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="803" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

803

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<td class="diff-line-num new_line" data-linenumber="805" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

805

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<pre style="margin: 0;"> <span id="LC805" class="line" lang="haskell">          <span class="kt" style="color: #458; font-weight: 600;">SkolemTv</span> <span class="n" style="color: #333;">tv_lvl</span> <span class="kr" style="font-weight: 600;">_</span>             <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">tv_lvl</span></span>

</pre>

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804

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<td class="diff-line-num new_line" data-linenumber="806" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

806

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<pre style="margin: 0;"> <span id="LC806" class="line" lang="haskell">          <span class="kt" style="color: #458; font-weight: 600;">RuntimeUnk</span>                    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">topTcLevel</span></span>

</pre>

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<br>

</li>

<li id="b817c80cbb15890d9a6df41e91d15d7442471f3c">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#b817c80cbb15890d9a6df41e91d15d7442471f3c"><strong>libraries/base/tests/all.T</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -20,7 +20,7 @@ test('tempfiles', normal, compile_and_run, [''])</td>

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<pre style="margin: 0;"> <span id="LC20" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'fixed'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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21

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<pre style="margin: 0;"> <span id="LC21" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'quotOverflow'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'assert'</span><span class="p">,</span> <span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">1</span><span class="p">),</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'-fno-ignore-asserts'</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC23" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'CPUTime001'</span><span class="p">,</span> <span class="nv" style="color: #008080;"><span class="idiff left right">normal</span></span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'CPUTime001'</span><span class="p">,</span> <span class="nv" style="color: #008080;"><span class="idiff left">fragile</span></span><span class="p"><span class="idiff">(</span></span><span class="mi" style="color: #099;"><span class="idiff">16224</span></span><span class="p"><span class="idiff right">)</span>,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'readLitChar'</span><span class="p">,</span>   <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'unicode001'</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="perl">     <span class="nv" style="color: #008080;">when</span><span class="p">(</span><span class="nv" style="color: #008080;">platform</span><span class="p">(</span><span class="s" style="color: #d14;">'i386-unknown-openbsd'</span><span class="p">),</span> <span class="nv" style="color: #008080;">expect_fail</span><span class="p">),</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="231" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="231" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -231,5 +231,5 @@ test('T3474',</td>

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<pre style="margin: 0;"> <span id="LC231" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T14425'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

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<pre style="margin: 0;"> <span id="LC232" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T10412'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

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<pre style="margin: 0;"> <span id="LC233" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T13896'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

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<pre style="margin: 0;">-<span id="LC234" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T13167'</span><span class="p">,</span> <span class="nv" style="color: #008080;"><span class="idiff left right">normal</span></span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

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<pre style="margin: 0;">+<span id="LC234" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T13167'</span><span class="p">,</span> <span class="nv" style="color: #008080;"><span class="idiff left">fragile_for</span></span><span class="p"><span class="idiff">(</span></span><span class="mi" style="color: #099;"><span class="idiff">16536</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="s" style="color: #d14;"><span class="idiff">'threaded2'</span></span><span class="p"><span class="idiff right">])</span>,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC235" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15349'</span><span class="p">,</span> <span class="p">[</span><span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">1</span><span class="p">),</span> <span class="nv" style="color: #008080;">expect_broken_for</span><span class="p">(</span><span class="mi" style="color: #099;">15349</span><span class="p">,</span> <span class="s" style="color: #d14;">'ghci'</span><span class="p">)],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span></pre>

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<br>

</li>

<li id="c591f85f122007bac88228c5ff6fd76b40e6a811">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#c591f85f122007bac88228c5ff6fd76b40e6a811"><strong>testsuite/driver/testlib.py</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -225,11 +225,35 @@ def _expect_pass(way):</td>

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<pre style="margin: 0;"> <span id="LC225" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC226" class="line" lang="python"><span class="c1" style="color: #998; font-style: italic;"># -----</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC227" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC228" class="line" lang="python"><span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">fragile</span><span class="p">(</span> <span class="n" style="color: #333;">bug</span> <span class="p">):</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC229" class="line" lang="python">    <span class="s" style="color: #d14;">"""</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC230" class="line" lang="python"><span class="s" style="color: #d14;">    Indicates that the test should be skipped due to fragility documented in</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC231" class="line" lang="python"><span class="s" style="color: #d14;">    the given ticket.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC232" class="line" lang="python"><span class="s" style="color: #d14;">    """</span></span>

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<pre style="margin: 0;">+<span id="LC233" class="line" lang="python">    <span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">helper</span><span class="p">(</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">bug</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">bug</span> <span class="p">):</span></span>

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<pre style="margin: 0;">+<span id="LC234" class="line" lang="python">        <span class="n" style="color: #333;">record_broken</span><span class="p">(</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">bug</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC235" class="line" lang="python">        <span class="n" style="color: #333;">opts</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">skip</span> <span class="o" style="font-weight: 600;">=</span> <span class="bp" style="color: #999;">True</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC236" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC237" class="line" lang="python">    <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">helper</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC238" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC239" class="line" lang="python"><span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">fragile_for</span><span class="p">(</span> <span class="n" style="color: #333;">bug</span><span class="p">,</span> <span class="n" style="color: #333;">ways</span> <span class="p">):</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC240" class="line" lang="python">    <span class="s" style="color: #d14;">"""</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC241" class="line" lang="python"><span class="s" style="color: #d14;">    Indicates that the test should be skipped due to fragility in the given</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC242" class="line" lang="python"><span class="s" style="color: #d14;">    test ways as documented in the given ticket.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC243" class="line" lang="python"><span class="s" style="color: #d14;">    """</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC244" class="line" lang="python">    <span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">helper</span><span class="p">(</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">bug</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">bug</span><span class="p">,</span> <span class="n" style="color: #333;">ways</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">ways</span> <span class="p">):</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC245" class="line" lang="python">        <span class="n" style="color: #333;">record_broken</span><span class="p">(</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">bug</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="246" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC246" class="line" lang="python">        <span class="n" style="color: #333;">opts</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">omit_ways</span> <span class="o" style="font-weight: 600;">+=</span> <span class="n" style="color: #333;">ways</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC247" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC248" class="line" lang="python">    <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">helper</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC249" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC250" class="line" lang="python"><span class="c1" style="color: #998; font-style: italic;"># -----</span></span>

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<pre style="margin: 0;">+<span id="LC251" class="line" lang="python"></span>

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<pre style="margin: 0;"> <span id="LC252" class="line" lang="python"><span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">omit_ways</span><span class="p">(</span> <span class="n" style="color: #333;">ways</span> <span class="p">):</span></span>

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<pre style="margin: 0;"> <span id="LC253" class="line" lang="python">    <span class="k" style="font-weight: 600;">return</span> <span class="k" style="font-weight: 600;">lambda</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">w</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">ways</span><span class="p">:</span> <span class="n" style="color: #333;">_omit_ways</span><span class="p">(</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">w</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="python"></span>

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<pre style="margin: 0;"> <span id="LC255" class="line" lang="python"><span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">_omit_ways</span><span class="p">(</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">opts</span><span class="p">,</span> <span class="n" style="color: #333;">ways</span> <span class="p">):</span></span>

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<pre style="margin: 0;">-<span id="LC232" class="line" lang="python">    <span class="n" style="color: #333;">opts</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">omit_ways</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ways</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC256" class="line" lang="python">    <span class="n" style="color: #333;">opts</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">omit_ways</span> <span class="o" style="font-weight: 600;"><span class="idiff left right">+</span>=</span> <span class="n" style="color: #333;">ways</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC257" class="line" lang="python"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC258" class="line" lang="python"><span class="c1" style="color: #998; font-style: italic;"># -----</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC259" class="line" lang="python"></span>

</pre>

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<br>

</li>

<li id="40142624dc4857a702b52f173a35277f48e3a483">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#40142624dc4857a702b52f173a35277f48e3a483"><strong>testsuite/tests/concurrent/should_run/all.T</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="89" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="89" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -89,7 +89,7 @@ test('T7970', normal, compile_and_run, [''])</td>

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<pre style="margin: 0;"> <span id="LC89" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'AtomicPrimops'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC90" class="line" lang="perl"></span>

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<pre style="margin: 0;"> <span id="LC91" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># test uses 2 threads and yield, scheduling can vary with threaded2</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC92" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'threadstatus-9333'</span><span class="p">,</span> <span class="p">[</span><span class="nv" style="color: #008080;">omit_ways</span><span class="p">([</span><span class="s" style="color: #d14;">'threaded2'</span><span class="p">])],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC92" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'threadstatus-9333'</span><span class="p">,</span> <span class="p">[</span><span class="nv" style="color: #008080;"><span class="idiff left">fragile_for</span></span><span class="p"><span class="idiff">(</span></span><span class="mi" style="color: #099;"><span class="idiff">16555</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="s" style="color: #d14;"><span class="idiff">'ghci'</span></span><span class="p"><span class="idiff">]),</span></span><span class="idiff right"> </span><span class="nv" style="color: #008080;">omit_ways</span><span class="p">([</span><span class="s" style="color: #d14;">'threaded2'</span><span class="p">])],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC93" class="line" lang="perl"></span>

</pre>

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94

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94

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<pre style="margin: 0;"> <span id="LC94" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T9379'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

</pre>

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95

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<td class="diff-line-num new_line" data-linenumber="95" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

95

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<pre style="margin: 0;"> <span id="LC95" class="line" lang="perl"></span>

</pre>

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</li>

<li id="13b8cf7619096f55d161ef6f6892fd8b6399f187">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#13b8cf7619096f55d161ef6f6892fd8b6399f187"><strong>testsuite/tests/ghci/scripts/T16767.script</strong></a>

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<td class="diff-line-num new new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">:set -fprint-explicit-foralls -fprint-explicit-kinds -XTypeApplications -XDataKinds</span>

</pre>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">import Data.Proxy</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">:kind! 'Proxy @_</span></pre>

</td>

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<br>

</li>

<li id="8c9b98ada81eb0b5ce37764a0ca63adffb8549d6">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#8c9b98ada81eb0b5ce37764a0ca63adffb8549d6"><strong>testsuite/tests/ghci/scripts/T16767.stdout</strong></a>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">'Proxy @_ :: forall {k} {_ :: k}. Proxy @{k} _</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">= 'Proxy @{k} @_</span></pre>

</td>

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<br>

</li>

<li id="080fb38cc741d3f1a476696b3373ab7cf48c2aaa">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#080fb38cc741d3f1a476696b3373ab7cf48c2aaa"><strong>testsuite/tests/ghci/scripts/all.T</strong></a>

<hr>

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<tr class="line_holder match" id="" style="line-height: 1.6;">

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -296,3 +296,4 @@ test('T16030', normal, ghci_script, ['T16030.script'])</td>

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296

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<pre style="margin: 0;"> <span id="LC296" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T11606'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">ghci_script</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'T11606.script'</span><span class="p">])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

297

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297

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<pre style="margin: 0;"> <span id="LC297" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T16089'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">ghci_script</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'T16089.script'</span><span class="p">])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

298

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<td class="diff-line-num new_line" data-linenumber="298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

298

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<pre style="margin: 0;"> <span id="LC298" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T16527'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">ghci_script</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'T16527.script'</span><span class="p">])</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC299" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T16767'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">ghci_script</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'T16767.script'</span><span class="p">])</span></span></pre>

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</li>

<li id="382baa1450ea74ecf1198bd2e384e396d34d414e">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#382baa1450ea74ecf1198bd2e384e396d34d414e"><strong>testsuite/tests/profiling/should_run/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -24,7 +24,7 @@ expect_broken_for_10037 = expect_broken_for(</td>

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24

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="perl"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'heapprof001'</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

26

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<td class="diff-line-num new_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="perl">     <span class="p">[</span><span class="nv" style="color: #008080;">when</span><span class="p">(</span><span class="nv" style="color: #008080;">have_profiling</span><span class="p">(),</span> <span class="nv" style="color: #008080;">extra_ways</span><span class="p">(</span><span class="nv" style="color: #008080;">extra_prof_ways</span><span class="p">)),</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

27

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<pre style="margin: 0;">-<span id="LC27" class="line" lang="perl">      <span class="nv" style="color: #008080;"><span class="idiff left">when</span></span><span class="p"><span class="idiff">(</span></span><span class="nv" style="color: #008080;"><span class="idiff">arch</span></span><span class="p"><span class="idiff">(</span></span><span class="s" style="color: #d14;"><span class="idiff">'i386'</span></span><span class="p"><span class="idiff">),</span></span><span class="idiff"> </span><span class="nv" style="color: #008080;"><span class="idiff">expect_broken_for</span></span><span class="p"><span class="idiff">(</span></span><span class="mi" style="color: #099;"><span class="idiff">15382</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="s" style="color: #d14;"><span class="idiff">'prof_hc_hb'</span></span><span class="p"><span class="idiff right">])</span>),</span></span>

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="perl">      <span class="nv" style="color: #008080;"><span class="idiff left">fragile</span></span><span class="p"><span class="idiff">(</span></span><span class="mi" style="color: #099;"><span class="idiff right">15382</span></span><span class="p">),</span></span>

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<td class="diff-line-num old_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

28

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<pre style="margin: 0;"> <span id="LC28" class="line" lang="perl">      <span class="nv" style="color: #008080;">extra_run_opts</span><span class="p">(</span><span class="s" style="color: #d14;">'7'</span><span class="p">)],</span></span>

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29

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="perl">     <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="perl"></span>

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<li id="f80799ecc01331b244dad18a881729fbb1f7bfb5">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#f80799ecc01331b244dad18a881729fbb1f7bfb5"><strong>testsuite/tests/typecheck/should_fail/T16517.hs</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE PolyKinds #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T16517</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Proxy</span></span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">a</span> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Proxy</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span><span class="p">)</span></span></pre>

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</li>

<li id="5a9a1ea6f14d9aad857ca084d18ff53bec57a93b">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#5a9a1ea6f14d9aad857ca084d18ff53bec57a93b"><strong>testsuite/tests/typecheck/should_fail/T16517.stderr</strong></a>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T16517.hs:5:29: error:</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Expected kind ‘k’, but ‘a’ has kind ‘k0’</span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the first argument of ‘Proxy’, namely ‘(a :: k)’</span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">      In the type signature: m :: Proxy (a :: k)</span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">      In the class declaration for ‘C’</span></pre>

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</li>

<li id="b9e86d897a62509b0114d81d5e736630d6f68f43">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#b9e86d897a62509b0114d81d5e736630d6f68f43"><strong>testsuite/tests/typecheck/should_fail/all.T</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -511,3 +511,4 @@ test('T16059e', [extra_files(['T16059b.hs'])], multimod_compile_fail,</td>

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<pre style="margin: 0;"> <span id="LC511" class="line" lang="perl"><span class="s" style="color: #d14;">    ['</span><span class="nv" style="color: #008080;">T16059e</span><span class="s" style="color: #d14;">', '</span><span class="o" style="font-weight: 600;">-</span><span class="nv" style="color: #008080;">v0</span><span class="s" style="color: #d14;">'])</span></span>

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512

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<td class="diff-line-num new_line" data-linenumber="512" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

512

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<pre style="margin: 0;"> <span id="LC512" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16255</span><span class="s" style="color: #d14;">', normal, compile_fail, [''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="513" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

513

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<td class="diff-line-num new_line" data-linenumber="513" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

513

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<pre style="margin: 0;"> <span id="LC513" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16204c</span><span class="s" style="color: #d14;">', normal, compile_fail, [''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="514" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="514" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

514

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<pre style="margin: 0;">+<span id="LC514" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16517</span><span class="s" style="color: #d14;">', normal, compile_fail, ['</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">'</span><span class="p">])</span></span></pre>

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<br>

</li>

<li id="336d4b3eabb2680482261a40f3a870ff666a17b8">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/db09cb59b386073f53ac5dad8d320f7a5ed22bee...6a8a448319cbfc7af23dffec33015562d992101b#336d4b3eabb2680482261a40f3a870ff666a17b8"><strong>testsuite/tests/typecheck/should_fail/tcfail134.stderr</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2,6 +2,5 @@</td>

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<td class="diff-line-num old_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2

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<td class="diff-line-num new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2

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<pre style="margin: 0;"> <span id="LC2" class="line" lang="plaintext">tcfail134.hs:5:33: error:</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<td class="diff-line-num new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<pre style="margin: 0;"> <span id="LC3" class="line" lang="plaintext">    • Expecting one more argument to ‘XML’</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4

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<td class="diff-line-num new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4

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<pre style="margin: 0;"> <span id="LC4" class="line" lang="plaintext">      Expected a type, but ‘XML’ has kind ‘* -> Constraint’</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

5

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<td class="diff-line-num new_line old" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">    • In the type signature:</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

6

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<td class="diff-line-num new_line old" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">        toXML :: a -> XML</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">    • In the type signature: toXML :: a -> XML</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<td class="diff-line-num new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">      In the class declaration for ‘XML’</span></pre>

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