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<h3>

Richard Eisenberg pushed to branch wip/T19044

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/9ea5ac7742d2f1baa5d68f3a578561f2d106fc84">9ea5ac77</a></strong>

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<span>by Richard Eisenberg</span>

<i>at 2020-12-11T14:22:38-05:00</i>

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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix #19044 by tweaking unification in inst lookup

See Note [Infinitary substitution in lookup] in GHC.Core.InstEnv

Test case: typecheck/should_compile/T19044

Close #19044

</pre>

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<h4>4 changed files:</h4>

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<li class="file-stats">

<a href="#5596bb0f228bd2a308c4391df97375ae879430a8">

compiler/GHC/Core/InstEnv.hs

</a>

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<li class="file-stats">

<a href="#89a2e0e1a3095c7a42b10f2819049908908080e8">

compiler/GHC/Core/Unify.hs

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<a href="#3b4a5529eef512d0a34907f104e2514734720f9a">

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+

testsuite/tests/typecheck/should_compile/T19044.hs

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<a href="#34fe7bf0e6fbf60effb28393399ba68666593909">

testsuite/tests/typecheck/should_compile/all.T

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<h4>Changes:</h4>

<li id="5596bb0f228bd2a308c4391df97375ae879430a8">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9ea5ac7742d2f1baa5d68f3a578561f2d106fc84#5596bb0f228bd2a308c4391df97375ae879430a8"><strong>compiler/GHC/Core/InstEnv.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">@@ -760,6 +760,47 @@ When we match this against D [ty], we return the instantiating types</td>

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<pre style="margin: 0;"> <span id="LC760" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">where the 'Nothing' indicates that 'b' can be freely instantiated.</span></span>

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761

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<pre style="margin: 0;"> <span id="LC761" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(The caller instantiates it to a flexi type variable, which will</span></span>

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762

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762

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<pre style="margin: 0;"> <span id="LC762" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> presumably later become fixed via functional dependencies.)</span></span>

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763

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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell"></span>

</pre>

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764

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<pre style="margin: 0;">+<span id="LC764" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Infinitary substitution in lookup]</span></span>

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765

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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<td class="diff-line-num new new_line" data-linenumber="766" 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">

766

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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider</span></span>

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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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768

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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  class C a b</span></span>

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<td class="diff-line-num new new_line" data-linenumber="769" 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">

769

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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  instance C c c</span></span>

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<td class="diff-line-num new new_line" data-linenumber="770" 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="LC770" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  instance C d (Maybe d)</span></span>

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771

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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  [W] C e (Maybe e)</span></span>

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772

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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">You would think we could just use the second instance, because the first doesn't</span></span>

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774

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<pre style="margin: 0;">+<span id="LC774" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">unify. But that's just ever so slightly wrong. The reason we check for unifiers</span></span>

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775

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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">along with matchers is that we don't want the possibility that a type variable</span></span>

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776

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<pre style="margin: 0;">+<span id="LC776" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">instantiation could cause an instance choice to change. Yet if we have</span></span>

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777

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<pre style="margin: 0;">+<span id="LC777" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  type family M = Maybe M</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="778" 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">

778

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<pre style="margin: 0;">+<span id="LC778" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and choose (e |-> M), then both instances match. This is absurd, but we cannot</span></span>

</pre>

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779

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<pre style="margin: 0;">+<span id="LC779" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rule it out. Yet, worrying about this case is awfully inconvenient to users,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="780" 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">

780

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<pre style="margin: 0;">+<span id="LC780" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and so we pretend the problem doesn't exist, by considering a lookup runs into</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="781" 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">

781

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<pre style="margin: 0;">+<span id="LC781" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">this occurs-check issue to indicate that an instance surely does not apply (i.e.</span></span>

</pre>

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782

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<pre style="margin: 0;">+<span id="LC782" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is like the SurelyApart case).</span></span>

</pre>

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783

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<pre style="margin: 0;">+<span id="LC783" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="784" 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">

784

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<pre style="margin: 0;">+<span id="LC784" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why don't we just exclude any instances that are MaybeApart? Because we might</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="785" 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">

785

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<pre style="margin: 0;">+<span id="LC785" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">have a [W] C e (F e), where F is a type family. The second instance above does</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="786" 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">

786

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<pre style="margin: 0;">+<span id="LC786" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">not match, but it should be included as a future possibility. Unification will</span></span>

</pre>

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787

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<pre style="margin: 0;">+<span id="LC787" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">return MaybeApart MARTypeFamily in this case.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="788" 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">

788

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<pre style="margin: 0;">+<span id="LC788" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="789" 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">

789

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<pre style="margin: 0;">+<span id="LC789" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">What can go wrong with this design choice? We might get incoherence -- but not</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="790" 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">

790

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<pre style="margin: 0;">+<span id="LC790" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">loss of type safety. In particular, if we have [W] C M M (for the M type family</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="791" 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">

791

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<pre style="margin: 0;">+<span id="LC791" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">above), then GHC might arbitrarily choose either instance, depending on how</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="792" 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">

792

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<pre style="margin: 0;">+<span id="LC792" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">M reduces (or doesn't).</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="793" 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">

793

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<pre style="margin: 0;">+<span id="LC793" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="794" 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">

794

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<pre style="margin: 0;">+<span id="LC794" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For type families, we can't just ignore the problem (as we essentially do here),</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="795" 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">

795

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<pre style="margin: 0;">+<span id="LC795" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">because doing so would give us a hole in the type safety proof (as explored in</span></span>

</pre>

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796

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<pre style="margin: 0;">+<span id="LC796" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Section 6 of "Closed Type Families with Overlapping Equations", POPL'14). This</span></span>

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797

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<pre style="margin: 0;">+<span id="LC797" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">possibility of an infinitary substitution manifests as closed type families that</span></span>

</pre>

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798

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<pre style="margin: 0;">+<span id="LC798" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">look like they should reduce, but don't. Users complain: #9082 and #17311. For</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="799" 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">

799

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<pre style="margin: 0;">+<span id="LC799" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">open type families, we actually can have unsoundness if we don't take infinitary</span></span>

</pre>

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800

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<pre style="margin: 0;">+<span id="LC800" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">substitutions into account: #8162. But, luckily, for class instances, we just</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="801" 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">

801

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<pre style="margin: 0;">+<span id="LC801" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">risk coherence -- not great, but it seems better to give users what they likely</span></span>

</pre>

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802

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<pre style="margin: 0;">+<span id="LC802" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">want. (Also, note that this problem existed for the entire decade of 201x without</span></span>

</pre>

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803

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<pre style="margin: 0;">+<span id="LC803" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">anyone noticing, so it's manifestly not ruining anyone's day.)</span></span>

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763

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804

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<pre style="margin: 0;"> <span id="LC804" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

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764

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805

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<pre style="margin: 0;"> <span id="LC805" class="line" lang="haskell"></span>

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806

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<pre style="margin: 0;"> <span id="LC806" class="line" lang="haskell"><span class="cd">-- |Look up an instance in the given instance environment. The given class application must match exactly</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="839" style="width: 35px; color: rgba(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>

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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">@@ -839,8 +880,10 @@ lookupInstEnv' ie vis_mods cls tys</td>

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<pre style="margin: 0;"> <span id="LC880" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- We consider MaybeApart to be a case where the instance might</span></span>

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<pre style="margin: 0;"> <span id="LC881" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- apply in the future. This covers an instance like C Int and</span></span>

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841

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<pre style="margin: 0;"> <span id="LC882" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- a target like [W] C (F a), where F is a type family.</span></span>

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<pre style="margin: 0;">-<span id="LC842" class="line" lang="haskell">            <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">find</span> <span class="n" style="color: #333;">ms</span> <span class="n" style="color: #333;">us</span>        <span class="n" style="color: #333;">rest</span></span>

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843

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<pre style="margin: 0;">-<span id="LC843" class="line" lang="haskell">            <span class="kr" style="font-weight: 600;">_</span>           <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">find</span> <span class="n" style="color: #333;">ms</span> <span class="p">(</span><span class="n" style="color: #333;">item</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">us</span><span class="p">)</span> <span class="n" style="color: #333;">rest</span></span>

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883

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<pre style="margin: 0;">+<span id="LC883" class="line" lang="haskell">            <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>              <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">find</span> <span class="n" style="color: #333;">ms</span> <span class="n" style="color: #333;">us</span>        <span class="n" style="color: #333;">rest</span></span>

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<pre style="margin: 0;">+<span id="LC884" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- Note [Infinitary substitution in lookup]</span></span>

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<pre style="margin: 0;">+<span id="LC885" class="line" lang="haskell">            <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="kt" style="color: #458; font-weight: 600;">MARInfinite</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">find</span> <span class="n" style="color: #333;">ms</span> <span class="n" style="color: #333;">us</span>        <span class="n" style="color: #333;">rest</span></span>

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<td class="diff-line-num new new_line" data-linenumber="886" 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">

886

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<pre style="margin: 0;">+<span id="LC886" class="line" lang="haskell">            <span class="kr" style="font-weight: 600;">_</span>                        <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">find</span> <span class="n" style="color: #333;">ms</span> <span class="p">(</span><span class="n" style="color: #333;">item</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">us</span><span class="p">)</span> <span class="n" style="color: #333;">rest</span></span>

</pre>

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844

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<td class="diff-line-num new_line" data-linenumber="887" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

887

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<pre style="margin: 0;"> <span id="LC887" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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845

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<td class="diff-line-num new_line" data-linenumber="888" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

888

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<pre style="margin: 0;"> <span id="LC888" class="line" lang="haskell">        <span class="n" style="color: #333;">tpl_tv_set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="n" style="color: #333;">tpl_tvs</span></span>

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<td class="diff-line-num old_line" data-linenumber="846" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

846

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889

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<pre style="margin: 0;"> <span id="LC889" class="line" lang="haskell">        <span class="n" style="color: #333;">tys_tv_set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypes</span> <span class="n" style="color: #333;">tys</span></span>

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<br>

</li>

<li id="89a2e0e1a3095c7a42b10f2819049908908080e8">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9ea5ac7742d2f1baa5d68f3a578561f2d106fc84#89a2e0e1a3095c7a42b10f2819049908908080e8"><strong>compiler/GHC/Core/Unify.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="18" style="width: 35px; color: rgba(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="18" style="width: 35px; color: rgba(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">@@ -18,7 +18,7 @@ module GHC.Core.Unify (</td>

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<td class="diff-line-num old_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

18

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18

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcUnifyTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcUnifyTyKi</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcUnifyTys</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcUnifyTyKis</span><span class="p">,</span></span>

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19

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19

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcUnifyTysFG</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcUnifyTyWithTFs</span><span class="p">,</span></span>

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20

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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">BindFlag</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

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21

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<td class="diff-line-num new_line old" data-linenumber="21" 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="LC21" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">UnifyResult</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">UnifyResult</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MaybeApartReason</span></span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">..</span></span><span class="p"><span class="idiff right">),</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

22

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<td class="diff-line-num new_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

22

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="23" style="width: 35px; color: rgba(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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<td class="diff-line-num new_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

23

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Matching a type against a lifted type (coercion)</span></span>

</pre>

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<td class="diff-line-num 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">

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">liftCoMatch</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="391" style="width: 35px; color: rgba(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="391" style="width: 35px; color: rgba(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">@@ -391,8 +391,8 @@ tcUnifyTyWithTFs twoWay t1 t2</td>

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<td class="diff-line-num old_line" data-linenumber="391" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

391

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<td class="diff-line-num new_line" data-linenumber="391" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

391

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<pre style="margin: 0;"> <span id="LC391" 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;">tc_unify_tys</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">BindMe</span><span class="p">)</span> <span class="n" style="color: #333;">twoWay</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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392

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<td class="diff-line-num new_line" data-linenumber="392" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

392

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<pre style="margin: 0;"> <span id="LC392" class="line" lang="haskell">                       <span class="n" style="color: #333;">rn_env</span> <span class="n" style="color: #333;">emptyTvSubstEnv</span> <span class="n" style="color: #333;">emptyCvSubstEnv</span></span>

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393

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<td class="diff-line-num new_line" data-linenumber="393" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

393

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<pre style="margin: 0;"> <span id="LC393" class="line" lang="haskell">                       <span class="p">[</span><span class="n" style="color: #333;">t1</span><span class="p">]</span> <span class="p">[</span><span class="n" style="color: #333;">t2</span><span class="p">]</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;">-<span id="LC394" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span>  <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">maybe_fix</span> <span class="n" style="color: #333;">subst</span></span>

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<pre style="margin: 0;">-<span id="LC395" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">maybe_fix</span> <span class="n" style="color: #333;">subst</span></span>

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<pre style="margin: 0;">+<span id="LC394" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span>  <span class="idiff left right">        </span><span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">maybe_fix</span> <span class="n" style="color: #333;">subst</span></span>

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<pre style="margin: 0;">+<span id="LC395" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;"><span class="idiff left">_reason</span></span><span class="idiff right"> </span><span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">maybe_fix</span> <span class="n" style="color: #333;">subst</span></span>

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<pre style="margin: 0;"> <span id="LC396" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- we want to *succeed* in questionable cases. This is a</span></span>

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<pre style="margin: 0;"> <span id="LC397" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- pre-unification algorithm.</span></span>

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<pre style="margin: 0;"> <span id="LC398" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>      <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</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">@@ -432,12 +432,23 @@ tcUnifyTyKis bind_fn tys1 tys2</td>

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<pre style="margin: 0;"> <span id="LC432" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- return the final result. See Note [Fine-grained unification]</span></span>

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<pre style="margin: 0;"> <span id="LC433" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResult</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span> <span class="kt" style="color: #458; font-weight: 600;">TCvSubst</span></span>

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<pre style="margin: 0;"> <span id="LC434" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</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;">Unifiable</span> <span class="n" style="color: #333;">a</span>        <span class="c1" style="color: #998; font-style: italic;">-- the subst that unifies the types</span></span>

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<pre style="margin: 0;">-<span id="LC435" class="line" lang="haskell">                    <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;">a</span>       <span class="c1" style="color: #998; font-style: italic;">-- the subst has as much as we know</span></span>

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<pre style="margin: 0;">+<span id="LC435" class="line" lang="haskell">                    <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApartReason</span></span>

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<pre style="margin: 0;">+<span id="LC436" class="line" lang="haskell">                                 <span class="n" style="color: #333;">a</span>       <span class="c1" style="color: #998; font-style: italic;">-- the subst has as much as we know</span></span>

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<pre style="margin: 0;"> <span id="LC437" class="line" lang="haskell">                                         <span class="c1" style="color: #998; font-style: italic;">-- it must be part of a most general unifier</span></span>

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<pre style="margin: 0;"> <span id="LC438" class="line" lang="haskell">                                         <span class="c1" style="color: #998; font-style: italic;">-- See Note [The substitution in MaybeApart]</span></span>

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<pre style="margin: 0;"> <span id="LC439" class="line" lang="haskell">                    <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span></span>

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<pre style="margin: 0;"> <span id="LC440" class="line" lang="haskell">                    <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span></span>

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<pre style="margin: 0;"> <span id="LC441" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC442" class="line" lang="haskell"><span class="cd">-- | Why are two types 'MaybeApart'? 'MARTypeFamily' takes precedence.</span></span>

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<pre style="margin: 0;">+<span id="LC443" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is used (only) in Note [Infinitary substitution in lookup] in GHC.Core.InstEnv</span></span>

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<pre style="margin: 0;">+<span id="LC444" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApartReason</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MARInfinite</span>     <span class="c1" style="color: #998; font-style: italic;">-- ^ matching e.g. a ~? Maybe a</span></span>

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<pre style="margin: 0;">+<span id="LC445" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MARTypeFamily</span>   <span class="c1" style="color: #998; font-style: italic;">-- ^ matching e.g. F Int ~? Bool</span></span>

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<pre style="margin: 0;">+<span id="LC446" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Ord</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC447" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC448" 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;">MaybeApartReason</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC449" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">MARInfinite</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"MARInfinite"</span></span>

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<pre style="margin: 0;">+<span id="LC450" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">MARTypeFamily</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"MARTypeFamily"</span></span>

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<pre style="margin: 0;">+<span id="LC451" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC452" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Applicative</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC453" class="line" lang="haskell">  <span class="n" style="color: #333;">pure</span>  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span></span>

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<pre style="margin: 0;"> <span id="LC454" class="line" lang="haskell">  <span class="p">(</span><span class="o" style="font-weight: 600;"><*></span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ap</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">@@ -445,9 +456,10 @@ instance Applicative UnifyResultM where</td>

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<pre style="margin: 0;"> <span id="LC456" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC457" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC458" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>  <span class="o" style="font-weight: 600;">>>=</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span></span>

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<pre style="margin: 0;">-<span id="LC448" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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449

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<pre style="margin: 0;">-<span id="LC449" class="line" lang="haskell">                         <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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450

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<pre style="margin: 0;">-<span id="LC450" class="line" lang="haskell">                         <span class="n" style="color: #333;">other</span>       <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">other</span></span>

</pre>

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459

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<pre style="margin: 0;">+<span id="LC459" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;">r1</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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460

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<pre style="margin: 0;">+<span id="LC460" class="line" lang="haskell">                            <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="n" style="color: #333;">y</span>     <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;">r1</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="451" 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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461

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<pre style="margin: 0;">+<span id="LC461" class="line" lang="haskell">                            <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;">r2</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="p">(</span><span class="n" style="color: #333;">max</span> <span class="n" style="color: #333;">r1</span> <span class="n" style="color: #333;">r2</span><span class="p">)</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="451" 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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462

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<pre style="margin: 0;">+<span id="LC462" class="line" lang="haskell">                            <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>     <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span></span>

</pre>

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451

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463

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<pre style="margin: 0;"> <span id="LC463" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="n" style="color: #333;">x</span>  <span class="o" style="font-weight: 600;">>>=</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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452

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464

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<pre style="margin: 0;"> <span id="LC464" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="453" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

453

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<td class="diff-line-num new_line" data-linenumber="465" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

465

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<pre style="margin: 0;"> <span id="LC465" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Alternative</span> <span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="530" style="width: 35px; color: rgba(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">@@ -530,9 +542,9 @@ tc_unify_tys bind_fn unif inj_check match_kis rn_env tv_env cv_env tys1 tys2</td>

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530

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<pre style="margin: 0;"> <span id="LC542" class="line" lang="haskell">    <span class="n" style="color: #333;">kis2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">typeKind</span> <span class="n" style="color: #333;">tys2</span></span>

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531

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543

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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC544" 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="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnifyResultM</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="545" 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="LC533" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"SurelyApart"</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC534" 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;">Unifiable</span> <span class="n" style="color: #333;">x</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;">"Unifiable"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC535" 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;">MaybeApart</span> <span class="n" style="color: #333;"><span class="idiff left">x</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"MaybeApart"</span></span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="536" 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="545" 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">

545

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<pre style="margin: 0;">+<span id="LC545" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>    <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"SurelyApart"</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="536" 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="546" 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">

546

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<pre style="margin: 0;">+<span id="LC546" 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;">Unifiable</span> <span class="n" style="color: #333;">x</span><span class="p">)</span>  <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Unifiable"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="536" 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="547" 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">

547

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<pre style="margin: 0;">+<span id="LC547" 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;">MaybeApart</span> <span class="n" style="color: #333;"><span class="idiff left">r</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"MaybeApart"</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><+></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">r</span></span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

536

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<td class="diff-line-num new_line" data-linenumber="548" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

548

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<pre style="margin: 0;"> <span id="LC548" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="537" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

537

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<td class="diff-line-num new_line" data-linenumber="549" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

549

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<pre style="margin: 0;"> <span id="LC549" 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="538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

538

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<td class="diff-line-num new_line" data-linenumber="550" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

550

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<pre style="margin: 0;"> <span id="LC550" 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 unfold js-unfold old_line" data-linenumber="994" style="width: 35px; color: rgba(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="1006" style="width: 35px; color: rgba(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">@@ -994,7 +1006,7 @@ unify_ty env ty1 ty2 _kco</td>

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994

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<td class="diff-line-num new_line" data-linenumber="1006" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1006

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<pre style="margin: 0;"> <span id="LC1006" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="995" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

995

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<td class="diff-line-num new_line" data-linenumber="1007" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1007

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<pre style="margin: 0;"> <span id="LC1007" class="line" lang="haskell">            <span class="p">;</span> <span class="n" style="color: #333;">unify_tys</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">inj_tys1</span> <span class="n" style="color: #333;">inj_tys2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="996" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

996

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<td class="diff-line-num new_line" data-linenumber="1008" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1008

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<pre style="margin: 0;"> <span id="LC1008" class="line" lang="haskell">            <span class="p">;</span> <span class="n" style="color: #333;">unless</span> <span class="p">(</span><span class="n" style="color: #333;">um_inj_tf</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="c1" style="color: #998; font-style: italic;">-- See (end of) Note [Specification of unification]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="997" 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">

997

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<td class="diff-line-num new_line old" data-linenumber="1009" 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="LC997" class="line" lang="haskell">              <span class="n" style="color: #333;">don'tBeSoSure</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">unify_tys</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">noninj_tys1</span> <span class="n" style="color: #333;">noninj_tys2</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="998" 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="1009" 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">

1009

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<pre style="margin: 0;">+<span id="LC1009" class="line" lang="haskell">              <span class="n" style="color: #333;">don'tBeSoSure</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MARTypeFamily</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">unify_tys</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">noninj_tys1</span> <span class="n" style="color: #333;">noninj_tys2</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="998" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

998

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<td class="diff-line-num new_line" data-linenumber="1010" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1010

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<pre style="margin: 0;"> <span id="LC1010" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="999" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

999

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<td class="diff-line-num new_line" data-linenumber="1011" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1011

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<pre style="margin: 0;"> <span id="LC1011" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tc1</span><span class="p">,</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;">mb_tc_app1</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1000" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1000

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<td class="diff-line-num new_line" data-linenumber="1012" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1012

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<pre style="margin: 0;"> <span id="LC1012" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isGenerativeTyCon</span> <span class="n" style="color: #333;">tc1</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1002" style="width: 35px; color: rgba(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="1014" style="width: 35px; color: rgba(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">@@ -1002,7 +1014,7 @@ unify_ty env ty1 ty2 _kco</td>

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1002

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<td class="diff-line-num new_line" data-linenumber="1014" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1014

</td>

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<pre style="margin: 0;"> <span id="LC1014" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--        because the (F ty1) behaves like a variable</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1003" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1003

</td>

<td class="diff-line-num new_line" data-linenumber="1015" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1015

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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--        NB: if unifying, we have already dealt</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1004" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1004

</td>

<td class="diff-line-num new_line" data-linenumber="1016" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1016

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<pre style="margin: 0;"> <span id="LC1016" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--            with the 'ty2 = variable' case</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1005" 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">

1005

</td>

<td class="diff-line-num new_line old" data-linenumber="1017" 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>

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<pre style="margin: 0;">-<span id="LC1005" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeApart</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1006" 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="1017" 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">

1017

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<pre style="margin: 0;">+<span id="LC1017" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeApart</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MARTypeFamily</span></span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1006" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1006

</td>

<td class="diff-line-num new_line" data-linenumber="1018" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1018

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<pre style="margin: 0;"> <span id="LC1018" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1007" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1007

</td>

<td class="diff-line-num new_line" data-linenumber="1019" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1019

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<pre style="margin: 0;"> <span id="LC1019" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tc2</span><span class="p">,</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;">mb_tc_app2</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1008" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1008

</td>

<td class="diff-line-num new_line" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1020

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<pre style="margin: 0;"> <span id="LC1020" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isGenerativeTyCon</span> <span class="n" style="color: #333;">tc2</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1010" style="width: 35px; color: rgba(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="1022" style="width: 35px; color: rgba(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">@@ -1010,7 +1022,7 @@ unify_ty env ty1 ty2 _kco</td>

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<td class="diff-line-num old_line" data-linenumber="1010" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1010

</td>

<td class="diff-line-num new_line" data-linenumber="1022" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1022

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<pre style="margin: 0;"> <span id="LC1022" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- E.g.   unify_ty [a] (F ty2) =  MaybeApart, when unifying (only)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1011" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1011

</td>

<td class="diff-line-num new_line" data-linenumber="1023" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1023

</td>

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<pre style="margin: 0;"> <span id="LC1023" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--        because the (F ty2) behaves like a variable</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1012" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1012

</td>

<td class="diff-line-num new_line" data-linenumber="1024" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1024

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<pre style="margin: 0;"> <span id="LC1024" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--        NB: we have already dealt with the 'ty1 = variable' case</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="1013" 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">

1013

</td>

<td class="diff-line-num new_line old" data-linenumber="1025" 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>

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<pre style="margin: 0;">-<span id="LC1013" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeApart</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="1014" 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="1025" 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">

1025

</td>

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

<pre style="margin: 0;">+<span id="LC1025" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeApart</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MARTypeFamily</span></span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1014" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1014

</td>

<td class="diff-line-num new_line" data-linenumber="1026" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1026

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<pre style="margin: 0;"> <span id="LC1026" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1015" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1015

</td>

<td class="diff-line-num new_line" data-linenumber="1027" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1027

</td>

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<pre style="margin: 0;"> <span id="LC1027" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1016" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1016

</td>

<td class="diff-line-num new_line" data-linenumber="1028" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1028

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<pre style="margin: 0;"> <span id="LC1028" class="line" lang="haskell">    <span class="n" style="color: #333;">mb_tc_app1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitTyConApp_maybe</span> <span class="n" style="color: #333;">ty1</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_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="diff-line-num unfold js-unfold new_line" data-linenumber="1202" style="width: 35px; color: rgba(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">@@ -1190,7 +1202,7 @@ bindTv env tv1 ty2</td>

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<td class="diff-line-num old_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

</td>

<td class="diff-line-num new_line" data-linenumber="1202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1202

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<pre style="margin: 0;"> <span id="LC1202" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Make sure you include 'kco' (which ty2 does) #14846</span></span>

</pre>

</td>

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<td class="diff-line-num old_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

</td>

<td class="diff-line-num new_line" data-linenumber="1203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1203

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<pre style="margin: 0;"> <span id="LC1203" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">occurs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">occursCheck</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">tv1</span> <span class="n" style="color: #333;">free_tvs2</span></span>

</pre>

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<td class="diff-line-num old_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

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<td class="diff-line-num new_line" data-linenumber="1204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1204

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<pre style="margin: 0;"> <span id="LC1204" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" 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">

1193

</td>

<td class="diff-line-num new_line old" data-linenumber="1205" 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="LC1193" class="line" lang="haskell">        <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">occurs</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">maybeApart</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1194" 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="1205" 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">

1205

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<pre style="margin: 0;">+<span id="LC1205" class="line" lang="haskell">        <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">occurs</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">maybeApart</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MARInfinite</span></span></span>

</pre>

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<td class="diff-line-num old_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="diff-line-num new_line" data-linenumber="1206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1206

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<pre style="margin: 0;"> <span id="LC1206" class="line" lang="haskell">                    <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">extendTvEnv</span> <span class="n" style="color: #333;">tv1</span> <span class="n" style="color: #333;">ty2</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_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

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<td class="diff-line-num new_line" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1207

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<pre style="margin: 0;"> <span id="LC1207" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_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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<td class="diff-line-num new_line" data-linenumber="1208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1208

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<pre style="margin: 0;"> <span id="LC1208" class="line" lang="haskell"><span class="n" style="color: #333;">occursCheck</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UMEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1291" style="width: 35px; color: rgba(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="1303" style="width: 35px; color: rgba(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">@@ -1291,9 +1303,9 @@ initUM :: TvSubstEnv  -- subst to extend</td>

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<td class="diff-line-num old_line" data-linenumber="1291" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1291

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<td class="diff-line-num new_line" data-linenumber="1303" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1303

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<pre style="margin: 0;"> <span id="LC1303" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UM</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;">UnifyResultM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1292

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<td class="diff-line-num new_line" data-linenumber="1304" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1304

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<pre style="margin: 0;"> <span id="LC1304" class="line" lang="haskell"><span class="n" style="color: #333;">initUM</span> <span class="n" style="color: #333;">subst_env</span> <span class="n" style="color: #333;">cv_subst_env</span> <span class="n" style="color: #333;">um</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1293

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<td class="diff-line-num new_line" data-linenumber="1305" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1305

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<pre style="margin: 0;"> <span id="LC1305" 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;">unUM</span> <span class="n" style="color: #333;">um</span> <span class="n" style="color: #333;">state</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1294" 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">

1294

</td>

<td class="diff-line-num new_line old" data-linenumber="1306" 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="LC1294" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">subst</span><span class="p">)</span>  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="n" style="color: #333;">subst</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1295" 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">

1295

</td>

<td class="diff-line-num new_line old" data-linenumber="1306" 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="LC1295" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="p"><span class="idiff left">(</span></span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">subst</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MaybeApart</span></span> <span class="n" style="color: #333;">subst</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1296" 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">

1296

</td>

<td class="diff-line-num new_line old" data-linenumber="1306" 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="LC1296" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1297" 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="1306" 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">

1306

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<pre style="margin: 0;">+<span id="LC1306" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">subst</span><span class="p">)</span>  <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Unifiable</span> <span class="n" style="color: #333;">subst</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1297" 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="1307" 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">

1307

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<pre style="margin: 0;">+<span id="LC1307" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;"><span class="idiff left">r</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">subst</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MaybeApart</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">r</span></span> <span class="n" style="color: #333;">subst</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1297" 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="1308" 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">

1308

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<pre style="margin: 0;">+<span id="LC1308" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span>           <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1297

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<td class="diff-line-num new_line" data-linenumber="1309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1309

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<pre style="margin: 0;"> <span id="LC1309" 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_line" data-linenumber="1298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1298

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<td class="diff-line-num new_line" data-linenumber="1310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1310

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<pre style="margin: 0;"> <span id="LC1310" class="line" lang="haskell">    <span class="n" style="color: #333;">state</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UMState</span> <span class="p">{</span> <span class="n" style="color: #333;">um_tv_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subst_env</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1299

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<td class="diff-line-num new_line" data-linenumber="1311" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1311

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<pre style="margin: 0;"> <span id="LC1311" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">um_cv_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cv_subst_env</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1333" style="width: 35px; color: rgba(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="1345" style="width: 35px; color: rgba(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">@@ -1333,9 +1345,7 @@ checkRnEnv :: UMEnv -> VarSet -> UM ()</td>

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<td class="diff-line-num old_line" data-linenumber="1333" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1333

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<td class="diff-line-num new_line" data-linenumber="1345" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1345

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<pre style="margin: 0;"> <span id="LC1345" class="line" lang="haskell"><span class="n" style="color: #333;">checkRnEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">varset</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1334" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1334

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<td class="diff-line-num new_line" data-linenumber="1346" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1346

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<pre style="margin: 0;"> <span id="LC1346" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">skol_vars</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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<td class="diff-line-num old_line" data-linenumber="1335" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1335

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<td class="diff-line-num new_line" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1347

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<pre style="margin: 0;"> <span id="LC1347" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">varset</span> <span class="p">`</span><span class="n" style="color: #333;">disjointVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">skol_vars</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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<td class="diff-line-num old old_line" data-linenumber="1336" 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">

1336

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<td class="diff-line-num new_line old" data-linenumber="1348" 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="LC1336" 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="n" style="color: #333;">maybeApart</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1337" 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">

1337

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<td class="diff-line-num new_line old" data-linenumber="1348" 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="LC1337" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- ToDo: why MaybeApart?</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1338" 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">

1338

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<td class="diff-line-num new_line old" data-linenumber="1348" 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="LC1338" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- I think SurelyApart would be right</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1339" 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="1348" 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">

1348

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<pre style="margin: 0;">+<span id="LC1348" 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="n" style="color: #333;">surelyApart</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1339" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1339

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<td class="diff-line-num new_line" data-linenumber="1349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1349

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<pre style="margin: 0;"> <span id="LC1349" 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_line" data-linenumber="1340" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1340

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<td class="diff-line-num new_line" data-linenumber="1350" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1350

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<pre style="margin: 0;"> <span id="LC1350" class="line" lang="haskell">    <span class="n" style="color: #333;">skol_vars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">um_skols</span> <span class="n" style="color: #333;">env</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1341" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1341

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<td class="diff-line-num new_line" data-linenumber="1351" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1351

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<pre style="margin: 0;"> <span id="LC1351" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- NB: That isEmptyVarSet guard is a critical optimization;</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1343" style="width: 35px; color: rgba(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="1353" style="width: 35px; color: rgba(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">@@ -1343,10 +1353,10 @@ checkRnEnv env varset</td>

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<td class="diff-line-num old_line" data-linenumber="1343" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1343

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<td class="diff-line-num new_line" data-linenumber="1353" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1353

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<pre style="margin: 0;"> <span id="LC1353" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- the type, often saving quite a bit of allocation.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1344" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1344

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<td class="diff-line-num new_line" data-linenumber="1354" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1354

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<pre style="margin: 0;"> <span id="LC1354" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1345" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1345

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<td class="diff-line-num new_line" data-linenumber="1355" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1355

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<pre style="margin: 0;"> <span id="LC1355" class="line" lang="haskell"><span class="cd">-- | Converts any SurelyApart to a MaybeApart</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1346" 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">

1346

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<td class="diff-line-num new_line old" data-linenumber="1356" 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="LC1346" class="line" lang="haskell"><span class="n" style="color: #333;">don'tBeSoSure</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1347" 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">

1347

</td>

<td class="diff-line-num new_line old" data-linenumber="1356" 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="LC1347" class="line" lang="haskell"><span class="n" style="color: #333;">don'tBeSoSure</span> <span class="n" style="color: #333;">um</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UM</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;">state</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="1348" 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="1356" 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">

1356

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<pre style="margin: 0;">+<span id="LC1356" class="line" lang="haskell"><span class="n" style="color: #333;">don'tBeSoSure</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MaybeApartReason</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="kt" style="color: #458; font-weight: 600;">UM</span> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1348" 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="1357" 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">

1357

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<pre style="margin: 0;">+<span id="LC1357" class="line" lang="haskell"><span class="n" style="color: #333;">don'tBeSoSure</span> <span class="n" style="color: #333;"><span class="idiff left">r</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">um</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UM</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;">state</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1348" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1348

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<td class="diff-line-num new_line" data-linenumber="1358" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1358

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<pre style="margin: 0;"> <span id="LC1358" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">unUM</span> <span class="n" style="color: #333;">um</span> <span class="n" style="color: #333;">state</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1349" 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">

1349

</td>

<td class="diff-line-num new_line old" data-linenumber="1359" 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="LC1349" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="p">(</span><span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1350" 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="1359" 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">

1359

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<pre style="margin: 0;">+<span id="LC1359" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeApart</span> <span class="n" style="color: #333;"><span class="idiff left">r</span></span><span class="idiff right"> </span><span class="p">(</span><span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1350" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1350

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<td class="diff-line-num new_line" data-linenumber="1360" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1360

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<pre style="margin: 0;"> <span id="LC1360" class="line" lang="haskell">    <span class="n" style="color: #333;">other</span>       <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">other</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1351" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1351

</td>

<td class="diff-line-num new_line" data-linenumber="1361" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1361

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<pre style="margin: 0;"> <span id="LC1361" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1352" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1352

</td>

<td class="diff-line-num new_line" data-linenumber="1362" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1362

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<pre style="margin: 0;"> <span id="LC1362" class="line" lang="haskell"><span class="n" style="color: #333;">umRnOccL</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UMEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1358" style="width: 35px; color: rgba(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="1368" style="width: 35px; color: rgba(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">@@ -1358,8 +1368,8 @@ umRnOccR env v = rnOccR (um_rn_env env) v</td>

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<td class="diff-line-num old_line" data-linenumber="1358" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1358

</td>

<td class="diff-line-num new_line" data-linenumber="1368" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1368

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<pre style="margin: 0;"> <span id="LC1368" class="line" lang="haskell"><span class="n" style="color: #333;">umSwapRn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UMEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UMEnv</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1359" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1359

</td>

<td class="diff-line-num new_line" data-linenumber="1369" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1369

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<pre style="margin: 0;"> <span id="LC1369" class="line" lang="haskell"><span class="n" style="color: #333;">umSwapRn</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">um_rn_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rnSwap</span> <span class="p">(</span><span class="n" style="color: #333;">um_rn_env</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1360" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1360

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<td class="diff-line-num new_line" data-linenumber="1370" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1370

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<pre style="margin: 0;"> <span id="LC1370" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1361" 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">

1361

</td>

<td class="diff-line-num new_line old" data-linenumber="1371" 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="LC1361" class="line" lang="haskell"><span class="n" style="color: #333;">maybeApart</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1362" 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">

1362

</td>

<td class="diff-line-num new_line old" data-linenumber="1371" 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="LC1362" class="line" lang="haskell"><span class="n" style="color: #333;">maybeApart</span> <span class="o" style="font-weight: 600;"><span class="idiff left">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">UM</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">state</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MaybeApart</span></span> <span class="p">(</span><span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1363" 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="1371" 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">

1371

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<pre style="margin: 0;">+<span id="LC1371" class="line" lang="haskell"><span class="n" style="color: #333;">maybeApart</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MaybeApartReason</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="kt" style="color: #458; font-weight: 600;">UM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1372" 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">

1372

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<pre style="margin: 0;">+<span id="LC1372" class="line" lang="haskell"><span class="n" style="color: #333;">maybeApart</span> <span class="n" style="color: #333;"><span class="idiff left">r</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">UM</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">state</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MaybeApart</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">r</span></span> <span class="p">(</span><span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">))</span></span>

</pre>

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1363

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<td class="diff-line-num new_line" data-linenumber="1373" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1373

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<pre style="margin: 0;"> <span id="LC1373" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1364" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1364

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<td class="diff-line-num new_line" data-linenumber="1374" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1374

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<pre style="margin: 0;"> <span id="LC1374" class="line" lang="haskell"><span class="n" style="color: #333;">surelyApart</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1365

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<td class="diff-line-num new_line" data-linenumber="1375" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1375

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<pre style="margin: 0;"> <span id="LC1375" class="line" lang="haskell"><span class="n" style="color: #333;">surelyApart</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UM</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SurelyApart</span><span class="p">)</span></span>

</pre>

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<br>

</li>

<li id="3b4a5529eef512d0a34907f104e2514734720f9a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9ea5ac7742d2f1baa5d68f3a578561f2d106fc84#3b4a5529eef512d0a34907f104e2514734720f9a"><strong>testsuite/tests/typecheck/should_compile/T19044.hs</strong></a>

<hr>

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1

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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 FlexibleInstances #-}</span></span>

</pre>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MultiParamTypeClasses #-}</span></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="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T19044</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="4" 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">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="5" 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">

5

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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="n" style="color: #333;">b</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="6" 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">

6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell">  <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span></span>

</pre>

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<td class="diff-line-num new new_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">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="8" 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">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">a</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="9" 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">

9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell">  <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="10" 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">

10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="11" 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">

11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="12" 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">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell">  <span class="n" style="color: #333;">m</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="13" 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">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="14" 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">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</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;">Maybe</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="15" 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">

15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">g</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="16" 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">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="17" 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">

17

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell">    <span class="n" style="color: #333;">g</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">h</span> <span class="p">(</span><span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="18" 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">

18

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" 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="19" 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">

19

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="n" style="color: #333;">h</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></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;">Maybe</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="20" 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">

20

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="n" style="color: #333;">h</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">const</span></span></pre>

</td>

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<br>

</li>

<li id="34fe7bf0e6fbf60effb28393399ba68666593909">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9ea5ac7742d2f1baa5d68f3a578561f2d106fc84#34fe7bf0e6fbf60effb28393399ba68666593909"><strong>testsuite/tests/typecheck/should_compile/all.T</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="734" style="width: 35px; color: rgba(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="734" style="width: 35px; color: rgba(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">@@ -734,6 +734,7 @@ test('T17186', normal, compile, [''])</td>

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<td class="diff-line-num old_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

734

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<td class="diff-line-num new_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

734

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<pre style="margin: 0;"> <span id="LC734" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">CbvOverlap</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

735

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<td class="diff-line-num new_line" data-linenumber="735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

735

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<pre style="margin: 0;"> <span id="LC735" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">InstanceGivenOverlap</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

736

</td>

<td class="diff-line-num new_line" data-linenumber="736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

736

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<pre style="margin: 0;"> <span id="LC736" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">InstanceGivenOverlap2</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="737" 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="737" 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">

737

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<pre style="margin: 0;">+<span id="LC737" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T19044</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

737

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<td class="diff-line-num new_line" data-linenumber="738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

738

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<pre style="margin: 0;"> <span id="LC738" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LocalGivenEqs</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

738

</td>

<td class="diff-line-num new_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

739

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<pre style="margin: 0;"> <span id="LC739" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LocalGivenEqs2</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

739

</td>

<td class="diff-line-num new_line" data-linenumber="740" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

740

</td>

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

<pre style="margin: 0;"> <span id="LC740" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18891</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span></pre>

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