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<h3>

 Marge Bot pushed to branch master

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/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e">3ab0d8f7</a></strong>

<div>

<span>by Sebastian Graf</span>

<i>at 2020-09-30T02:48:27-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Long-distance information for LocalBinds (#18626)

Now `desugarLocalBind` (formerly `desugarLet`) reasons about

  * `FunBind`s that

    * Have no pattern matches (so which aren't functions)

    * Have a singleton match group with a single GRHS

    * (which may have guards)

  * and looks through trivial post-typechecking `AbsBinds` in doing so

    to pick up the introduced renamings.

And desugars to `PmLet` LYG-style guards. Since GRHSs are no longer

denoted simply by `NonEmpty PmGRHS`, but also need to carry a `[PmGrd]`

for the `PmLet`s from `LocalBind`s, I added `PmGRHSs` to capture that.

Since we call out to the desugarer more often, I found that there were

superfluous warnings emitted when desugaring e.g. case expressions.

Thus, I made sure that we deactivate any warnings in the LYG desugaring

steps by the new wrapper function `noCheckDs`.

There's a regression test in `T18626`. Fixes #18626.

</pre>

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<h4>6 changed files:</h4>

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<li class="file-stats">

<a href="#36e7b8d61b4fae8f65fca3984d01eb4076712f2b">

compiler/GHC/HsToCore/Pmc.hs

</a>

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<li class="file-stats">

<a href="#3050d0d7e4a9e93aebcc1fe0bed898ca6dac5502">

compiler/GHC/HsToCore/Pmc/Check.hs

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<li class="file-stats">

<a href="#950eaa7de202a2e915b5ff68a4cfd16e972ad359">

compiler/GHC/HsToCore/Pmc/Desugar.hs

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<li class="file-stats">

<a href="#0036eccef60579fe5f653a10eeb8bf9869964cf4">

compiler/GHC/HsToCore/Pmc/Types.hs

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<a href="#bd4e4e3967a6fa58d8c448bb716f8323a7a64157">

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+

testsuite/tests/pmcheck/should_compile/T18626.hs

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<li class="file-stats">

<a href="#a52966ece03f9e76a93a2c4ea96b9fb25368723d">

testsuite/tests/pmcheck/should_compile/all.T

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<h4>Changes:</h4>

<li id="36e7b8d61b4fae8f65fca3984d01eb4076712f2b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e#36e7b8d61b4fae8f65fca3984d01eb4076712f2b"><strong>compiler/GHC/HsToCore/Pmc.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="59" style="width: 35px; color: rgba(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="59" style="width: 35px; color: rgba(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">@@ -59,6 +59,7 @@ import GHC.HsToCore.Pmc.Ppr</td>

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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Basic</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Origin</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="LC60" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</span></span>

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<pre style="margin: 0;">+<span id="LC62" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Types</span></span>

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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs</span></span>

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span></span>

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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.SrcLoc</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">@@ -66,11 +67,12 @@ import GHC.Utils.Misc</td>

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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>

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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>

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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvVar</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC70" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types</span></span>

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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.TcType</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">evVarPred</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">HsToCore</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Expr</span> <span class="p">(</span><span class="n" style="color: #333;">dsLExpr</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.HsToCore.Monad</span></span>

</pre>

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74

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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Bag</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC73" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.IOEnv</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">unsafeInterleaveM</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC75" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.IOEnv</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">u<span class="idiff left">pdEnv</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">u</span>nsafeInterleaveM</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.OrdList</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Monad</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">mapMaybeM</span><span class="p">)</span></span>

</pre>

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78

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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="95" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="97" style="width: 35px; color: rgba(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">@@ -95,12 +97,22 @@ getLdiNablas = do</td>

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<pre style="margin: 0;"> <span id="LC97" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">True</span>  <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nablas</span></span>

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<pre style="margin: 0;"> <span id="LC98" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">initNablas</span></span>

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99

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<pre style="margin: 0;"> <span id="LC99" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC100" class="line" lang="haskell"><span class="cd">-- | We need to call the Hs desugarer to get the Core of a let-binding or where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC101" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- clause. We don't want to run the coverage checker when doing so! Efficiency</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="102" 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="LC102" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- is one concern, but also a lack of properly set up long-distance information</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC103" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- might trigger warnings that we normally wouldn't emit.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC104" class="line" lang="haskell"><span class="n" style="color: #333;">noCheckDs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</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;">DsM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="105" 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="LC105" class="line" lang="haskell"><span class="n" style="color: #333;">noCheckDs</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="106" 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="LC106" class="line" lang="haskell">  <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">dflags'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldl'</span> <span class="n" style="color: #333;">wopt_unset</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">allPmCheckWarnings</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="108" 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="LC108" class="line" lang="haskell">  <span class="n" style="color: #333;">updEnv</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</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;">env_top</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">env_top</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="p">{</span><span class="n" style="color: #333;">hsc_dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dflags'</span><span class="p">}</span> <span class="p">})</span> <span class="n" style="color: #333;">k</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="98" 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="109" 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="LC109" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="98" style="width: 35px; color: rgba(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="110" style="width: 35px; color: rgba(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="LC110" class="line" lang="haskell"><span class="cd">-- | Check a pattern binding (let, where) for exhaustiveness.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="99" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

99

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<td class="diff-line-num new_line" data-linenumber="111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

111

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell"><span class="n" style="color: #333;">pmcPatBind</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Pat</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [pmcPatBind only checks PatBindRhs]</span></span>

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<td class="diff-line-num old_line" data-linenumber="101" style="width: 35px; color: rgba(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="113" style="width: 35px; color: rgba(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="LC113" class="line" lang="haskell"><span class="n" style="color: #333;">pmcPatBind</span> <span class="n" style="color: #333;">ctxt</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="kt" style="color: #458; font-weight: 600;">PatBindRhs</span> <span class="n" style="color: #333;">loc</span><span class="p">)</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="114" 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="LC102" class="line" lang="haskell">  <span class="n" style="color: #333;"><span class="idiff left">missing</span></span><span class="idiff right">  </span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLdiNablas</span></span>

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<pre style="margin: 0;">-<span id="LC103" class="line" lang="haskell">  <span class="n" style="color: #333;">pat_bind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">desugarPatBind</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">p</span></span>

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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell">  <span class="o" style="font-weight: 600;"><span class="idiff left">!</span></span><span class="n" style="color: #333;"><span class="idiff right">missing</span></span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLdiNablas</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="104" 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="115" 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="LC115" class="line" lang="haskell">  <span class="n" style="color: #333;">pat_bind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">noCheckDs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">desugarPatBind</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">p</span></span>

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<td class="diff-line-num new_line" data-linenumber="116" style="width: 35px; color: rgba(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="LC116" class="line" lang="haskell">  <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"pmcPatBind {"</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ctxt</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">pat_bind</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">missing</span><span class="p">])</span></span>

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<pre style="margin: 0;"> <span id="LC117" class="line" lang="haskell">  <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unCA</span> <span class="p">(</span><span class="n" style="color: #333;">checkPatBind</span> <span class="n" style="color: #333;">pat_bind</span><span class="p">)</span> <span class="n" style="color: #333;">missing</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="118" style="width: 35px; color: rgba(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="LC118" class="line" lang="haskell">  <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"}: "</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">cr_uncov</span> <span class="n" style="color: #333;">result</span><span class="p">))</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="117" style="width: 35px; color: rgba(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="129" style="width: 35px; color: rgba(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">@@ -117,8 +129,8 @@ pmcGRHSs</td>

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<pre style="margin: 0;"> <span id="LC129" class="line" lang="haskell"><span class="n" style="color: #333;">pmcGRHSs</span> <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">guards</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">grhss</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">combined_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldl1</span> <span class="n" style="color: #333;">combineSrcSpans</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">getLoc</span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span></span>

</pre>

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119

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131

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<pre style="margin: 0;"> <span id="LC131" class="line" lang="haskell">      <span class="n" style="color: #333;">ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">combined_loc</span></span>

</pre>

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120

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<td class="diff-line-num new_line old" data-linenumber="132" 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="LC120" class="line" lang="haskell">  <span class="n" style="color: #333;"><span class="idiff left">matches</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">desugarGRHSs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">combined_loc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">empty</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">guard</span>s</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="121" 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">

121

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<td class="diff-line-num new_line old" data-linenumber="132" 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="LC121" class="line" lang="haskell">  <span class="n" style="color: #333;">m<span class="idiff left">issing</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 right">getLdiNabla</span>s</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="122" 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="132" 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="LC132" class="line" lang="haskell">  <span class="o" style="font-weight: 600;"><span class="idiff left">!</span></span><span class="n" style="color: #333;"><span class="idiff">missing</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 right">getLdiNabla</span>s</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="122" 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="LC133" class="line" lang="haskell">  <span class="n" style="color: #333;">m<span class="idiff left">atches</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">noCheckDs</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">desugarGRHSs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">combined_loc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">empty</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">guard</span>s</span></span>

</pre>

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122

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<pre style="margin: 0;"> <span id="LC134" class="line" lang="haskell">  <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"pmcGRHSs"</span> <span class="p">(</span><span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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123

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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell">                                <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Guards:"</span><span class="p">])</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="136" style="width: 35px; color: rgba(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="LC136" class="line" lang="haskell">                                <span class="mi" style="color: #099;">2</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="126" style="width: 35px; color: rgba(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="138" style="width: 35px; color: rgba(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">@@ -126,7 +138,7 @@ pmcGRHSs hs_ctxt guards@(GRHSs _ grhss _) = do</td>

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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell">  <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unCA</span> <span class="p">(</span><span class="n" style="color: #333;">checkGRHSs</span> <span class="n" style="color: #333;">matches</span><span class="p">)</span> <span class="n" style="color: #333;">missing</span></span>

</pre>

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139

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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell">  <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"}: "</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">cr_uncov</span> <span class="n" style="color: #333;">result</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell">  <span class="n" style="color: #333;">formatReportWarnings</span> <span class="n" style="color: #333;">cirbsGRHSs</span> <span class="n" style="color: #333;">ctxt</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">result</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="141" 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="LC129" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ldiGRHS</span><span class="idiff left"> </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">cr_ret</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">result</span></span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="141" 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">

141

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ldiGRHS<span class="idiff left">s</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">cr_ret</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">result</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

142

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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="131" style="width: 35px; color: rgba(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="143" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

143

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<pre style="margin: 0;"> <span id="LC143" class="line" lang="haskell"><span class="cd">-- | Check a list of syntactic 'Match'es (part of case, functions, etc.), each</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC144" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- with a 'Pat' and one or more 'GRHSs':</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="153" style="width: 35px; color: rgba(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="165" style="width: 35px; color: rgba(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">@@ -153,7 +165,7 @@ pmcMatches ctxt vars matches = do</td>

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<pre style="margin: 0;"> <span id="LC165" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- We have to force @missing@ before printing out the trace message,</span></span>

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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- otherwise we get interleaved output from the solver. This function</span></span>

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<td class="diff-line-num old_line" data-linenumber="155" style="width: 35px; color: rgba(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="LC167" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- should be strict in @missing@ anyway!</span></span>

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<pre style="margin: 0;">-<span id="LC156" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">missing</span> <span class="idiff left right">  </span><span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLdiNablas</span></span>

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<td class="diff-line-num new old_line" data-linenumber="157" 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="LC168" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">missing</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLdiNablas</span></span>

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<pre style="margin: 0;"> <span id="LC169" class="line" lang="haskell">  <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"pmcMatches {"</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC170" class="line" lang="haskell">          <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ctxt</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">vars</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Matches:"</span><span class="p">])</span></span>

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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell">               <span class="mi" style="color: #099;">2</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="162" style="width: 35px; color: rgba(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="174" style="width: 35px; color: rgba(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">@@ -162,13 +174,13 @@ pmcMatches ctxt vars matches = do</td>

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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- This must be an -XEmptyCase. See Note [Checking EmptyCase]</span></span>

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<pre style="margin: 0;"> <span id="LC176" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">only</span> <span class="n" style="color: #333;">vars</span></span>

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<pre style="margin: 0;">-<span id="LC165" class="line" lang="haskell">      <span class="n" style="color: #333;">empty_case</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">desugarEmptyCase</span> <span class="n" style="color: #333;">var</span></span>

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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell">      <span class="n" style="color: #333;">empty_case</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">noCheckDs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">desugarEmptyCase</span> <span class="n" style="color: #333;">var</span></span>

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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell">      <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unCA</span> <span class="p">(</span><span class="n" style="color: #333;">checkEmptyCase</span> <span class="n" style="color: #333;">empty_case</span><span class="p">)</span> <span class="n" style="color: #333;">missing</span></span>

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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell">      <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"}: "</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">cr_uncov</span> <span class="n" style="color: #333;">result</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell">      <span class="n" style="color: #333;">formatReportWarnings</span> <span class="n" style="color: #333;">cirbsEmptyCase</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">result</span></span>

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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell">      <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="170" style="width: 35px; color: rgba(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="LC182" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">matches</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;">-<span id="LC171" class="line" lang="haskell">      <span class="n" style="color: #333;">matches</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">desugarMatches</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">matches</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="172" 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="LC183" class="line" lang="haskell">      <span class="n" style="color: #333;">matches</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">noCheckDs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">desugarMatches</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">matches</span></span>

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<td class="diff-line-num new_line" data-linenumber="184" style="width: 35px; color: rgba(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="LC184" class="line" lang="haskell">      <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unCA</span> <span class="p">(</span><span class="n" style="color: #333;">checkMatchGroup</span> <span class="n" style="color: #333;">matches</span><span class="p">)</span> <span class="n" style="color: #333;">missing</span></span>

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<pre style="margin: 0;"> <span id="LC185" class="line" lang="haskell">      <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"}: "</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">cr_uncov</span> <span class="n" style="color: #333;">result</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell">      <span class="n" style="color: #333;">formatReportWarnings</span> <span class="n" style="color: #333;">cirbsMatchGroup</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">result</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="201" style="width: 35px; color: rgba(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="213" style="width: 35px; color: rgba(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">@@ -201,7 +213,10 @@ ldiMatchGroup (PmMatchGroup matches) = ldiMatch <$> matches</td>

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell"><span class="n" style="color: #333;">ldiMatch</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Nablas</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">Nablas</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell"><span class="n" style="color: #333;">ldiMatch</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">red</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>

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<td class="diff-line-num new_line old" data-linenumber="216" 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="LC204" class="line" lang="haskell">  <span class="p">(</span><span class="n" style="color: #333;">rs_cov</span> <span class="n" style="color: #333;">red</span><span class="p">,</span> <span class="n" style="color: #333;">ldiGRHS</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="216" 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="LC216" class="line" lang="haskell">  <span class="p">(</span><span class="n" style="color: #333;">rs_cov</span> <span class="n" style="color: #333;">red</span><span class="p">,</span> <span class="n" style="color: #333;">ldiGRHSs</span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="217" 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="LC217" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="205" 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="218" 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="LC218" class="line" lang="haskell"><span class="n" style="color: #333;">ldiGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">Nablas</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell"><span class="n" style="color: #333;">ldiGRHSs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="p">{</span> <span class="n" style="color: #333;">pgs_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ldiGRHS</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;"> <span id="LC220" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC221" class="line" lang="haskell"><span class="n" style="color: #333;">ldiGRHS</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nablas</span></span>

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<pre style="margin: 0;"> <span id="LC222" class="line" lang="haskell"><span class="n" style="color: #333;">ldiGRHS</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="p">{</span> <span class="n" style="color: #333;">pg_grds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">red</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rs_cov</span> <span class="n" style="color: #333;">red</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="277" style="width: 35px; color: rgba(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="292" style="width: 35px; color: rgba(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">@@ -277,8 +292,8 @@ cirbsMatch PmMatch { pm_pats = red, pm_grhss = grhss } = do</td>

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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">applyWhen</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">is_covered</span><span class="p">)</span> <span class="n" style="color: #333;">markAllRedundant</span></span>

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<pre style="margin: 0;"> <span id="LC293" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cirb</span></span>

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<pre style="margin: 0;"> <span id="LC294" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC280" class="line" lang="haskell"><span class="n" style="color: #333;">cirbsGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NonEmpty</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmGRHS</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Post</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CIRB</span></span>

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<pre style="margin: 0;">-<span id="LC281" class="line" lang="haskell"><span class="n" style="color: #333;">cirbsGRHSs</span> <span class="n" style="color: #333;"><span class="idiff left right">grhss</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Semi</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">sconcat</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">traverse</span> <span class="n" style="color: #333;">cirbsGRHS</span> <span class="n" style="color: #333;">grhss</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC295" class="line" lang="haskell"><span class="n" style="color: #333;">cirbsGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">PmGRHSs</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Post</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CIRB</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="282" 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="296" 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="LC296" class="line" lang="haskell"><span class="n" style="color: #333;">cirbsGRHSs</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmGRHSs</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pgs_grhss</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">grhss</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">})</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Semi</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">sconcat</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">traverse</span> <span class="n" style="color: #333;">cirbsGRHS</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;"> <span id="LC297" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC298" class="line" lang="haskell"><span class="n" style="color: #333;">cirbsGRHS</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CIRB</span></span>

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<pre style="margin: 0;"> <span id="LC299" class="line" lang="haskell"><span class="n" style="color: #333;">cirbsGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="p">{</span> <span class="n" style="color: #333;">pg_grds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">red</span><span class="p">,</span> <span class="n" style="color: #333;">pg_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">info</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

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<br>

</li>

<li id="3050d0d7e4a9e93aebcc1fe0bed898ca6dac5502">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e#3050d0d7e4a9e93aebcc1fe0bed898ca6dac5502"><strong>compiler/GHC/HsToCore/Pmc/Check.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="167" style="width: 35px; color: rgba(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">@@ -167,8 +167,9 @@ checkMatch :: PmMatch Pre -> CheckAction (PmMatch Post)</td>

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell"><span class="n" style="color: #333;">checkMatch</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GrdVec</span> <span class="n" style="color: #333;">grds</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC168" class="line" lang="haskell">  <span class="n" style="color: #333;">leftToRight</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="p">(</span><span class="n" style="color: #333;">checkGrds</span> <span class="n" style="color: #333;">grds</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">checkGRHSs</span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

169

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<td class="diff-line-num new_line" data-linenumber="169" style="width: 35px; color: rgba(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="LC169" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="170" 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">

170

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<pre style="margin: 0;">-<span id="LC170" class="line" lang="haskell"><span class="n" style="color: #333;">checkGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Pre</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CheckAction</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC171" class="line" lang="haskell"><span class="n" style="color: #333;">checkGRHSs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">checkSequence</span> <span class="n" style="color: #333;">checkGRHS</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="170" 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="LC170" class="line" lang="haskell"><span class="n" style="color: #333;">checkGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">Pre</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CheckAction</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="172" 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="171" 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="LC171" class="line" lang="haskell"><span class="n" style="color: #333;">checkGRHSs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="p">{</span> <span class="n" style="color: #333;">pgs_lcls</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GrdVec</span> <span class="n" style="color: #333;">lcls</span><span class="p">,</span> <span class="n" style="color: #333;">pgs_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell">  <span class="n" style="color: #333;">leftToRight</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="p">(</span><span class="n" style="color: #333;">checkGrds</span> <span class="n" style="color: #333;">lcls</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">checkSequence</span> <span class="n" style="color: #333;">checkGRHS</span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="173" style="width: 35px; color: rgba(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="LC173" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="173" style="width: 35px; color: rgba(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="174" style="width: 35px; color: rgba(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="LC174" class="line" lang="haskell"><span class="n" style="color: #333;">checkGRHS</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Pre</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CheckAction</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Post</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="174" style="width: 35px; color: rgba(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="175" style="width: 35px; color: rgba(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="LC175" class="line" lang="haskell"><span class="n" style="color: #333;">checkGRHS</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="p">{</span> <span class="n" style="color: #333;">pg_grds</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GrdVec</span> <span class="n" style="color: #333;">grds</span><span class="p">,</span> <span class="n" style="color: #333;">pg_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_info</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>

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<br>

</li>

<li id="950eaa7de202a2e915b5ff68a4cfd16e972ad359">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e#950eaa7de202a2e915b5ff68a4cfd16e972ad359"><strong>compiler/GHC/HsToCore/Pmc/Desugar.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -26,6 +26,7 @@ import GHC.HsToCore.Pmc.Types</td>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.HsToCore.Pmc.Utils</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Expr</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">App</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">unpackFS</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lengthFS</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Bag</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">bagToList</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</span></span>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs</span></span>

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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Zonk</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">shortCutLit</span><span class="p">)</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="36" style="width: 35px; color: rgba(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="37" style="width: 35px; color: rgba(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">@@ -36,6 +37,7 @@ import GHC.Builtin.Types</td>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.SrcLoc</span></span>

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<pre style="margin: 0;"> <span id="LC38" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>

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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span></span>

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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.DataCon</span></span>

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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvVar</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="326" style="width: 35px; color: rgba(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="328" style="width: 35px; color: rgba(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">@@ -326,12 +328,14 @@ desugarMatch vars (L match_loc (Match { m_pats = pats, m_grhss = grhss })) = do</td>

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<pre style="margin: 0;"> <span id="LC328" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- tracePm "desugarMatch" (vcat [ppr pats, ppr pats', ppr grhss'])</span></span>

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<pre style="margin: 0;"> <span id="LC329" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GrdVec</span> <span class="n" style="color: #333;">pats'</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss'</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC330" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC329" class="line" lang="haskell"><span class="n" style="color: #333;">desugarGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Pre</span><span class="p">))</span></span>

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<pre style="margin: 0;">-<span id="LC330" class="line" lang="haskell"><span class="n" style="color: #333;">desugarGRHSs</span> <span class="n" style="color: #333;">match_loc</span> <span class="n" style="color: #333;">pp_pats</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;">-<span id="LC331" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">traverse</span> <span class="p">(</span><span class="n" style="color: #333;">desugarLGRHS</span> <span class="n" style="color: #333;">match_loc</span> <span class="n" style="color: #333;">pp_pats</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC332" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">expectJust</span> <span class="s" style="color: #d14;">"desugarGRHSs"</span></span>

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<pre style="margin: 0;">-<span id="LC333" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">NE</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">nonEmpty</span></span>

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<pre style="margin: 0;">-<span id="LC334" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">grhssGRHSs</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;">+<span id="LC331" class="line" lang="haskell"><span class="n" style="color: #333;">desugarGRHSs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">Pre</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC332" class="line" lang="haskell"><span class="n" style="color: #333;">desugarGRHSs</span> <span class="n" style="color: #333;">match_loc</span> <span class="n" style="color: #333;">pp_pats</span> <span class="n" style="color: #333;">grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;">+<span id="LC333" class="line" lang="haskell">  <span class="n" style="color: #333;">lcls</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">desugarLocalBinds</span> <span class="p">(</span><span class="n" style="color: #333;">grhssLocalBinds</span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell">  <span class="n" style="color: #333;">grhss'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">traverse</span> <span class="p">(</span><span class="n" style="color: #333;">desugarLGRHS</span> <span class="n" style="color: #333;">match_loc</span> <span class="n" style="color: #333;">pp_pats</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC335" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">expectJust</span> <span class="s" style="color: #d14;">"desugarGRHSs"</span></span>

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<pre style="margin: 0;">+<span id="LC336" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">NE</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">nonEmpty</span></span>

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<pre style="margin: 0;">+<span id="LC337" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">grhssGRHSs</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;">+<span id="LC338" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="p">{</span> <span class="n" style="color: #333;">pgs_lcls</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GrdVec</span> <span class="n" style="color: #333;">lcls</span><span class="p">,</span> <span class="n" style="color: #333;">pgs_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss'</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC339" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC340" class="line" lang="haskell"><span class="cd">-- | Desugar a guarded right-hand side to a single 'GrdTree'</span></span>

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<pre style="margin: 0;"> <span id="LC341" class="line" lang="haskell"><span class="n" style="color: #333;">desugarLGRHS</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">Pre</span><span class="p">)</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">@@ -351,7 +355,7 @@ desugarLGRHS match_loc pp_pats (L _loc (GRHS _ gs _)) = do</td>

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<pre style="margin: 0;"> <span id="LC355" class="line" lang="haskell"><span class="n" style="color: #333;">desugarGuard</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GuardStmt</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span><span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC356" class="line" lang="haskell"><span class="n" style="color: #333;">desugarGuard</span> <span class="n" style="color: #333;">guard</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">guard</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;"> <span id="LC357" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">BodyStmt</span> <span class="kr" style="font-weight: 600;">_</span>   <span class="n" style="color: #333;">e</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">desugarBoolGuard</span> <span class="n" style="color: #333;">e</span></span>

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<pre style="margin: 0;">-<span id="LC354" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">LetStmt</span>  <span class="kr" style="font-weight: 600;">_</span>   <span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">desugarL<span class="idiff left">et</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unLoc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binds</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;">+<span id="LC358" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">LetStmt</span>  <span class="kr" style="font-weight: 600;">_</span>   <span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">desugarL<span class="idiff left">ocalBinds</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">binds</span></span></span>

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<pre style="margin: 0;"> <span id="LC359" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">BindStmt</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">e</span>     <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">desugarBind</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">e</span></span>

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<pre style="margin: 0;"> <span id="LC360" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">LastStmt</span>        <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"desugarGuard LastStmt"</span></span>

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<pre style="margin: 0;"> <span id="LC361" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">ParStmt</span>         <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"desugarGuard ParStmt"</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">@@ -359,9 +363,39 @@ desugarGuard guard = case guard of</td>

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<pre style="margin: 0;"> <span id="LC363" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">RecStmt</span>         <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"desugarGuard RecStmt"</span></span>

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<pre style="margin: 0;"> <span id="LC364" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">ApplicativeStmt</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"desugarGuard ApplicativeLastStmt"</span></span>

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<pre style="margin: 0;"> <span id="LC365" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC362" class="line" lang="haskell"><span class="cd">-- | Desugar let-bindings</span></span>

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<pre style="margin: 0;">-<span id="LC363" class="line" lang="haskell"><span class="n" style="color: #333;">desugarLet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsLocalBinds</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span><span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC364" class="line" lang="haskell"><span class="n" style="color: #333;">desugarLet</span> <span class="n" style="color: #333;">_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

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<pre style="margin: 0;">+<span id="LC366" class="line" lang="haskell"><span class="cd">-- | Desugar local bindings to a bunch of 'PmLet' guards.</span></span>

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<pre style="margin: 0;">+<span id="LC367" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Deals only with simple @let@ or @where@ bindings without any polymorphism,</span></span>

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<pre style="margin: 0;">+<span id="LC368" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- recursion, pattern bindings etc.</span></span>

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<pre style="margin: 0;">+<span id="LC369" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Long-distance information for HsLocalBinds].</span></span>

</pre>

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370

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<pre style="margin: 0;">+<span id="LC370" class="line" lang="haskell"><span class="n" style="color: #333;">desugarLocalBinds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsLocalBinds</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span><span class="p">]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC371" class="line" lang="haskell"><span class="n" style="color: #333;">desugarLocalBinds</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsValBinds</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XValBindsLR</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NValBinds</span> <span class="n" style="color: #333;">binds</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))))</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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372

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<pre style="margin: 0;">+<span id="LC372" class="line" lang="haskell">  <span class="n" style="color: #333;">concatMapM</span> <span class="p">(</span><span class="n" style="color: #333;">concatMapM</span> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">bagToList</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">snd</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC373" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC374" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsBind</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span><span class="p">]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC375" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">FunBind</span><span class="p">{</span><span class="n" style="color: #333;">fun_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">fun_matches</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mg</span><span class="p">})</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC376" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- See Note [Long-distance information for HsLocalBinds] for why this</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC377" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- pattern match is so very specific.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC378" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">Match</span><span class="p">{</span><span class="n" style="color: #333;">m_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">m_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span><span class="p">}]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mg_alts</span> <span class="n" style="color: #333;">mg</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC379" class="line" lang="haskell">      <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span><span class="p">{</span><span class="n" style="color: #333;">grhssGRHSs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRHS</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">_grds</span> <span class="n" style="color: #333;">rhs</span><span class="p">)]}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC380" class="line" lang="haskell">          <span class="n" style="color: #333;">core_rhs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsLExpr</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC381" class="line" lang="haskell">          <span class="n" style="color: #333;">return</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmLet</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">core_rhs</span><span class="p">]</span></span>

</pre>

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382

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<pre style="margin: 0;">+<span id="LC382" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">AbsBinds</span><span class="p">{</span> <span class="n" style="color: #333;">abs_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">abs_ev_vars</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC383" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">abs_exports</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">exports</span><span class="p">,</span> <span class="n" style="color: #333;">abs_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binds</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

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384

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<pre style="margin: 0;">+<span id="LC384" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- Typechecked HsLocalBinds are wrapped in AbsBinds, which carry</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="385" 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">

385

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<pre style="margin: 0;">+<span id="LC385" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- renamings. See Note [Long-distance information for HsLocalBinds]</span></span>

</pre>

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386

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<pre style="margin: 0;">+<span id="LC386" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- for the details.</span></span>

</pre>

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387

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<pre style="margin: 0;">+<span id="LC387" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">go_export</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ABExport</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">PmGrd</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="388" 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">

388

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<pre style="margin: 0;">+<span id="LC388" class="line" lang="haskell">          <span class="n" style="color: #333;">go_export</span> <span class="kt" style="color: #458; font-weight: 600;">ABE</span><span class="p">{</span><span class="n" style="color: #333;">abe_poly</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">abe_mono</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="n" style="color: #333;">abe_wrap</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrap</span><span class="p">}</span></span>

</pre>

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389

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<pre style="margin: 0;">+<span id="LC389" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isIdHsWrapper</span> <span class="n" style="color: #333;">wrap</span></span>

</pre>

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390

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<pre style="margin: 0;">+<span id="LC390" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">x</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">y</span><span class="p">))</span></span>

</pre>

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391

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<pre style="margin: 0;">+<span id="LC391" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">PmLet</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">y</span><span class="p">)</span></span>

</pre>

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392

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<pre style="margin: 0;">+<span id="LC392" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

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393

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<pre style="margin: 0;">+<span id="LC393" class="line" lang="haskell">            <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 new_line" data-linenumber="394" 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">

394

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<pre style="margin: 0;">+<span id="LC394" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">exps</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">go_export</span> <span class="n" style="color: #333;">exports</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="395" 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">

395

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<pre style="margin: 0;">+<span id="LC395" class="line" lang="haskell">      <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">concatMapM</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">bagToList</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="396" 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">

396

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<pre style="margin: 0;">+<span id="LC396" class="line" lang="haskell">      <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">exps</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="397" 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">

397

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<pre style="margin: 0;">+<span id="LC397" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="398" 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">

398

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<pre style="margin: 0;">+<span id="LC398" class="line" lang="haskell"><span class="n" style="color: #333;">desugarLocalBinds</span> <span class="n" style="color: #333;">_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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365

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399

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<pre style="margin: 0;"> <span id="LC399" class="line" lang="haskell"></span>

</pre>

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366

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400

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<pre style="margin: 0;"> <span id="LC400" class="line" lang="haskell"><span class="cd">-- | Desugar a pattern guard</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="367" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

367

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401

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<pre style="margin: 0;"> <span id="LC401" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   @pat <- e ==>  let x = e;  <guards for pat <- x>@</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="447" style="width: 35px; color: rgba(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="481" style="width: 35px; color: rgba(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">@@ -447,4 +481,43 @@ a lot of false warnings.</td>

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<td class="diff-line-num old_line" data-linenumber="447" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

447

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481

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<pre style="margin: 0;"> <span id="LC481" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="448" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

448

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<td class="diff-line-num new_line" data-linenumber="482" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

482

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<pre style="margin: 0;"> <span id="LC482" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But we can check whether the coercion is a hole or if it is just refl, in</span></span>

</pre>

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449

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<td class="diff-line-num new_line" data-linenumber="483" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

483

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<pre style="margin: 0;"> <span id="LC483" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">which case we can drop it.</span></span>

</pre>

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484

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<pre style="margin: 0;">+<span id="LC484" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="485" 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">

485

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<pre style="margin: 0;">+<span id="LC485" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Long-distance information for HsLocalBinds]</span></span>

</pre>

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486

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<pre style="margin: 0;">+<span id="LC486" 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 new new_line" data-linenumber="487" 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">

487

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<pre style="margin: 0;">+<span id="LC487" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider (#18626)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="488" 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">

488

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<pre style="margin: 0;">+<span id="LC488" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="489" 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">

489

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<pre style="margin: 0;">+<span id="LC489" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  f :: Int -> ()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="490" 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">

490

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<pre style="margin: 0;">+<span id="LC490" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  f x | y = ()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="491" 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">

491

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<pre style="margin: 0;">+<span id="LC491" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="450" 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="492" 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">

492

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<pre style="margin: 0;">+<span id="LC492" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      y = True</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="493" 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">

493

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<pre style="margin: 0;">+<span id="LC493" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="494" 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">

494

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<pre style="margin: 0;">+<span id="LC494" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  x :: ()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="495" 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">

495

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<pre style="margin: 0;">+<span id="LC495" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  x | let y = True, y = ()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="496" 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">

496

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<pre style="margin: 0;">+<span id="LC496" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="497" 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">

497

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<pre style="margin: 0;">+<span id="LC497" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Both definitions are exhaustive, but to make the necessary long-distance</span></span>

</pre>

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498

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<pre style="margin: 0;">+<span id="LC498" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">connection from @y@'s binding to its use site in a guard, we have to collect</span></span>

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<pre style="margin: 0;">+<span id="LC499" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'PmLet' guards for the 'HsLocalBinds' which contain @y@'s definitions.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC500" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC501" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In principle, we are only interested in desugaring local binds that are</span></span>

</pre>

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502

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<pre style="margin: 0;">+<span id="LC502" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'FunBind's, that</span></span>

</pre>

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503

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<pre style="margin: 0;">+<span id="LC503" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC504" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Have no pattern matches. If @y@ above had any patterns, it would be a</span></span>

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505

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<pre style="margin: 0;">+<span id="LC505" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    function and we can't reason about them anyway.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC506" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Have singleton match group with a single GRHS.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC507" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Otherwise, what expression to pick in the generated guard @let y = <rhs>@?</span></span>

</pre>

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508

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<pre style="margin: 0;">+<span id="LC508" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC509" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">It turns out that desugaring type-checked local binds in this way is a bit</span></span>

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<pre style="margin: 0;">+<span id="LC510" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">more complex than expected: Apparently, all bindings are wrapped in 'AbsBinds'</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC511" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Nfter type-checking. See Note [AbsBinds] in "GHC.Hs.Binds".</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC512" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC513" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We make sure that there is no polymorphism in the way by checking that there</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC514" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">are no 'abs_tvs' or 'abs_ev_vars' (we don't reason about</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC515" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">@y :: forall a. Eq a => ...@) and that the exports carry no 'HsWrapper's. In</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC516" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">this case, the exports are a simple renaming substitution that we can capture</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC517" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with 'PmLet'. Ultimately we'll hit those renamed 'FunBind's, though, which is</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC518" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the whole point.</span></span>

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<pre style="margin: 0;">+<span id="LC519" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC520" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The place to store the 'PmLet' guards for @where@ clauses (which are per</span></span>

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<pre style="margin: 0;">+<span id="LC521" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'GRHSs') is as a field of 'PmGRHSs'. For plain @let@ guards as in the guards of</span></span>

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<pre style="margin: 0;">+<span id="LC522" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">@x@, we can simply add them to the 'pg_grds' field of 'PmGRHS'.</span></span>

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450

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<pre style="margin: 0;"> <span id="LC523" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span></pre>

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<br>

</li>

<li id="0036eccef60579fe5f653a10eeb8bf9869964cf4">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e#0036eccef60579fe5f653a10eeb8bf9869964cf4"><strong>compiler/GHC/HsToCore/Pmc/Types.hs</strong></a>

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<td class="diff-line-num unfold js-unfold 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">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -22,7 +22,7 @@ module GHC.HsToCore.Pmc.Types (</td>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">SrcInfo</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmGrd</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">GrdVec</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

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23

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- ** Guard tree language</span></span>

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<pre style="margin: 0;">-<span id="LC25" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmMatchGroup</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmPatBind</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmEmptyCase</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="LC25" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmMatchGroup</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHS<span class="idiff left">s</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">),</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">PmGRHS</span></span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmPatBind</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmEmptyCase</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

</pre>

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26

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="27" style="width: 35px; color: rgba(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="LC27" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Coverage Checking types</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">RedSets</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">Precision</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">CheckResult</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="112" style="width: 35px; color: rgba(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="112" style="width: 35px; color: rgba(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">@@ -112,7 +112,13 @@ newtype PmMatchGroup p = PmMatchGroup (NonEmpty (PmMatch p))</td>

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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"><span class="cd">-- | A guard tree denoting 'Match': A payload describing the pats and a bunch of</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- GRHS.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC115" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_pats</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grhss</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="n" style="color: #333;">p</span><span class="p">))</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmMatch</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_pats</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grhss</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="n" style="color: #333;">p</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"><span class="cd">-- | A guard tree denoting 'GRHSs': A bunch of 'PmLet' guards for local</span></span>

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<pre style="margin: 0;">+<span id="LC118" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- bindings from the 'GRHSs's @where@ clauses and the actual list of 'GRHS'.</span></span>

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<pre style="margin: 0;">+<span id="LC119" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Long-distance information for HsLocalBinds] in</span></span>

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<pre style="margin: 0;">+<span id="LC120" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- "GHC.HsToCore.Pmc.Desugar".</span></span>

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<pre style="margin: 0;">+<span id="LC121" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmGRHSs</span> <span class="p">{</span> <span class="n" style="color: #333;">pgs_lcls</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="n" style="color: #333;">pgs_grhss</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGRHS</span> <span class="n" style="color: #333;">p</span><span class="p">))}</span></span>

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<pre style="margin: 0;"> <span id="LC122" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC123" class="line" lang="haskell"><span class="cd">-- | A guard tree denoting 'GRHS': A payload describing the grds and a 'SrcInfo'</span></span>

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<pre style="margin: 0;"> <span id="LC124" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- useful for printing out in warnings messages.</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="149" style="width: 35px; color: rgba(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">@@ -149,6 +155,10 @@ instance Outputable p => Outputable (PmMatch p) where</td>

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<pre style="margin: 0;"> <span id="LC155" 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;">PmMatch</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grds</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>

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<pre style="margin: 0;"> <span id="LC156" class="line" lang="haskell">    <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">grds</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;"> <span id="LC157" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC158" 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;">p</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;">PmGRHSs</span> <span class="n" style="color: #333;">p</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="152" 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="159" 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">

159

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<pre style="margin: 0;">+<span id="LC159" 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;">PmGRHSs</span> <span class="p">{</span> <span class="n" style="color: #333;">pgs_lcls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">_lcls</span><span class="p">,</span> <span class="n" style="color: #333;">pgs_grhss</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span> <span class="p">})</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="152" 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="160" 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">

160

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="haskell">    <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">grhss</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="152" 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="161" 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">

161

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="152" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

152

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<td class="diff-line-num new_line" data-linenumber="162" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

162

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<pre style="margin: 0;"> <span id="LC162" 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;">p</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;">PmGRHS</span> <span class="n" style="color: #333;">p</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 old_line" data-linenumber="153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

153

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<td class="diff-line-num new_line" data-linenumber="163" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

163

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<pre style="margin: 0;"> <span id="LC163" 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;">PmGRHS</span> <span class="p">{</span> <span class="n" style="color: #333;">pg_grds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grds</span><span class="p">,</span> <span class="n" style="color: #333;">pg_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

154

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<td class="diff-line-num new_line" data-linenumber="164" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

164

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<pre style="margin: 0;"> <span id="LC164" class="line" lang="haskell">    <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">grds</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"->"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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<br>

</li>

<li id="bd4e4e3967a6fa58d8c448bb716f8323a7a64157">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e#bd4e4e3967a6fa58d8c448bb716f8323a7a64157"><strong>testsuite/tests/pmcheck/should_compile/T18626.hs</strong></a>

<hr>

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

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -Wincomplete-patterns -fforce-recomp #-}</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="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="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">

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

<pre style="margin: 0;">+<span id="LC4" 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">

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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="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">::</span> <span class="nb" style="color: #0086b3;">()</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="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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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">|</span> <span class="kr" style="font-weight: 600;">let</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;">True</span><span class="p">,</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">=</span> <span class="nb" style="color: #0086b3;">()</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 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="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="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="nb" style="color: #0086b3;">()</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;">f</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">=</span> <span class="nb" style="color: #0086b3;">()</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 class="kr" style="font-weight: 600;">where</span></span>

</pre>

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11

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

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<li id="a52966ece03f9e76a93a2c4ea96b9fb25368723d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e#a52966ece03f9e76a93a2c4ea96b9fb25368723d"><strong>testsuite/tests/pmcheck/should_compile/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="148" style="width: 35px; color: rgba(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="148" style="width: 35px; color: rgba(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">@@ -148,6 +148,8 @@ test('T18478', collect_compiler_stats('bytes allocated',10), compile,</td>

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148

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148

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<pre style="margin: 0;"> <span id="LC148" class="line" lang="perl">     <span class="p">['</span><span class="s1" style="color: #d14;">-fwarn-incomplete-patterns -fwarn-overlapping-patterns</span><span class="p">'])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="149" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

149

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149

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<pre style="margin: 0;"> <span id="LC149" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18533</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>

</pre>

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150

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150

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<pre style="margin: 0;"> <span id="LC150" class="line" lang="perl">     <span class="p">['</span><span class="s1" style="color: #d14;">-fwarn-incomplete-patterns -fwarn-overlapping-patterns</span><span class="p">'])</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="151" 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">

151

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<pre style="margin: 0;">+<span id="LC151" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18626</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>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="151" 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="152" 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">

152

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<pre style="margin: 0;">+<span id="LC152" class="line" lang="perl">     <span class="p">['</span><span class="s1" style="color: #d14;">-fwarn-incomplete-patterns -fwarn-overlapping-patterns</span><span class="p">'])</span></span>

</pre>

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151

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<td class="diff-line-num new_line" data-linenumber="153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

153

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<pre style="margin: 0;"> <span id="LC153" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18572</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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="152" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

152

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<td class="diff-line-num new_line" data-linenumber="154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

154

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<pre style="margin: 0;"> <span id="LC154" class="line" lang="perl">     <span class="p">['</span><span class="s1" style="color: #d14;">-fwarn-incomplete-patterns -fwarn-incomplete-uni-patterns -fwarn-overlapping-patterns</span><span class="p">'])</span></span>

</pre>

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153

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<td class="diff-line-num new_line" data-linenumber="155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

155

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<pre style="margin: 0;"> <span id="LC155" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18609</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>

</pre>

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