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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/1959bad3feb9a05c8a5f2a4249a2506c5770d6fe">1959bad3</a></strong>

<div>

<span>by Vladislav Zavialov</span>

<i>at 2019-04-22T18:50:18Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Stop misusing EWildPat in pattern match coverage checking

EWildPat is a constructor of HsExpr used in the parser to represent

wildcards in ambiguous positions:

* in expression context, EWildPat is turned into hsHoleExpr (see rnExpr)

* in pattern context, EWildPat is turned into WildPat (see checkPattern)

Since EWildPat exists solely for the needs of the parser, we could

remove it by improving the parser.

However, EWildPat has also been used for a different purpose since

8a50610: to represent patterns that the coverage checker cannot handle.

Not only this is a misuse of EWildPat, it also stymies the removal of

EWildPat.

</pre>

</li>

</ul>

<h4>1 changed file:</h4>

<ul>

<li class="file-stats">

<a href="#bd37d71fa68b0980d832d992b427fd6a6bdb891d">

compiler/deSugar/Check.hs

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="bd37d71fa68b0980d832d992b427fd6a6bdb891d">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/1959bad3feb9a05c8a5f2a4249a2506c5770d6fe#bd37d71fa68b0980d832d992b427fd6a6bdb891d"><strong>compiler/deSugar/Check.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="157" style="width: 35px; color: rgba(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="157" style="width: 35px; color: rgba(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">@@ -157,7 +157,9 @@ data PmPat :: PatTy -> * where</td>

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<td class="diff-line-num old_line" data-linenumber="157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

157

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<td class="diff-line-num new_line" data-linenumber="157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

157

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<pre style="margin: 0;"> <span id="LC157" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmNLit</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_lit_id</span>   <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="158" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

158

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158

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">pm_lit_not</span>  <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">]</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmPat</span> <span class="sc" style="color: #d14;">'V</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">A</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="159" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

159

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<td class="diff-line-num new_line" data-linenumber="159" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

159

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<pre style="margin: 0;"> <span id="LC159" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmGrd</span>  <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_grd_pv</span>   <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PatVec</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="160" 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">

160

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<td class="diff-line-num new_line old" data-linenumber="160" 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="LC160" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">pm_grd_expr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span>  <span class="p">}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmPat</span> <span class="sc" style="color: #d14;">'P</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">A</span><span class="kt" style="color: #458; font-weight: 600;">T</span></span>

</pre>

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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="p">,</span> <span class="n" style="color: #333;">pm_grd_expr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmPat</span> <span class="sc" style="color: #d14;">'P</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">A</span><span class="kt" style="color: #458; font-weight: 600;">T</span></span>

</pre>

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<td class="diff-line-num new old_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">

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161

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- | A fake guard pattern (True <- _) used to represent cases we cannot handle.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="162" style="width: 35px; color: rgba(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="LC162" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmFake</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmPat</span> <span class="sc" style="color: #d14;">'P</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">A</span><span class="kt" style="color: #458; font-weight: 600;">T</span></span>

</pre>

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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">

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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num 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">

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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">

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<pre style="margin: 0;"> <span id="LC164" 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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmPat</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old_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">

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<td class="diff-line-num 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">

165

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

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="928" style="width: 35px; color: rgba(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="930" style="width: 35px; color: rgba(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">@@ -928,24 +930,11 @@ truePattern :: Pattern</td>

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<td class="diff-line-num old_line" data-linenumber="928" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

928

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<td class="diff-line-num new_line" data-linenumber="930" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

930

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<pre style="margin: 0;"> <span id="LC930" class="line" lang="haskell"><span class="n" style="color: #333;">truePattern</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nullaryConPattern</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">trueDataCon</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC931" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE truePattern #-}</span></span>

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<pre style="margin: 0;"> <span id="LC932" class="line" lang="haskell"></span>

</pre>

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931

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<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC931" class="line" lang="haskell"><span class="cd">-- | A fake guard pattern (True <- _) used to represent cases we cannot handle</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="932" 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">

932

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC932" class="line" lang="haskell"><span class="n" style="color: #333;">fake_pat</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Pattern</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="933" 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">

933

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC933" class="line" lang="haskell"><span class="n" style="color: #333;">fake_pat</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_grd_pv</span>   <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">truePattern</span><span class="p">]</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="934" 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">

934

</td>

<td class="diff-line-num new_line old" data-linenumber="933" 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="LC934" class="line" lang="haskell">                 <span class="p">,</span> <span class="n" style="color: #333;">pm_grd_expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EWildPat</span> <span class="n" style="color: #333;">noExt</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="935" 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">

935

</td>

<td class="diff-line-num new_line old" data-linenumber="933" 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="LC935" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE fake_pat #-}</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="936" 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">

936

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC936" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="937" 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">

937

</td>

<td class="diff-line-num new_line old" data-linenumber="933" 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="LC937" class="line" lang="haskell"><span class="cd">-- | Check whether a guard pattern is generated by the checker (unhandled)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="938" 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">

938

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC938" class="line" lang="haskell"><span class="n" style="color: #333;">isFakeGuard</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Pattern</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="939" 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">

939

</td>

<td class="diff-line-num new_line old" data-linenumber="933" 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="LC939" class="line" lang="haskell"><span class="n" style="color: #333;">isFakeGuard</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmCon</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_con_con</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">c</span> <span class="p">}]</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EWildPat</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="940" 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">

940

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC940" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">trueDataCon</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="941" 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">

941

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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

<pre style="margin: 0;">-<span id="LC941" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>        <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="942" 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">

942

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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

<pre style="margin: 0;">-<span id="LC942" class="line" lang="haskell"><span class="n" style="color: #333;">isFakeGuard</span> <span class="n" style="color: #333;">_pats</span> <span class="n" style="color: #333;">_e</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="943" 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">

943

</td>

<td class="diff-line-num new_line old" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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

<pre style="margin: 0;">-<span id="LC943" class="line" lang="haskell"></span>

</pre>

</td>

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

<td class="diff-line-num old_line" data-linenumber="944" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

944

</td>

<td class="diff-line-num new_line" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

933

</td>

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<pre style="margin: 0;"> <span id="LC933" class="line" lang="haskell"><span class="cd">-- | Generate a `canFail` pattern vector of a specific type</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="945" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

945

</td>

<td class="diff-line-num new_line" data-linenumber="934" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

934

</td>

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

<pre style="margin: 0;"> <span id="LC934" class="line" lang="haskell"><span class="n" style="color: #333;">mkCanFailPmPat</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</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;">PatVec</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="946" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

946

</td>

<td class="diff-line-num new_line" data-linenumber="935" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

935

</td>

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

<pre style="margin: 0;"> <span id="LC935" class="line" lang="haskell"><span class="n" style="color: #333;">mkCanFailPmPat</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="947" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

947

</td>

<td class="diff-line-num new_line" data-linenumber="936" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

936

</td>

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

<pre style="margin: 0;"> <span id="LC936" class="line" lang="haskell">  <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkPmVar</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old old_line" data-linenumber="948" 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">

948

</td>

<td class="diff-line-num new_line old" data-linenumber="937" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC948" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="p">[</span><span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left right">fake_pat</span></span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="937" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

937

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<pre style="margin: 0;">+<span id="LC937" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="p">[</span><span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">PmFake</span></span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="949" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

949

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<td class="diff-line-num new_line" data-linenumber="938" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

938

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<pre style="margin: 0;"> <span id="LC938" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="950" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

950

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<td class="diff-line-num new_line" data-linenumber="939" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

939

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<pre style="margin: 0;"> <span id="LC939" class="line" lang="haskell"><span class="n" style="color: #333;">vanillaConPattern</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ConLike</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PatVec</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Pattern</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="951" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

951

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<td class="diff-line-num new_line" data-linenumber="940" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

940

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<pre style="margin: 0;"> <span id="LC940" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ADT constructor pattern => no existentials, no local constraints</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1295" style="width: 35px; color: rgba(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="1284" style="width: 35px; color: rgba(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">@@ -1295,7 +1284,7 @@ translateGuards fam_insts guards = do</td>

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<pre style="margin: 0;"> <span id="LC1284" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">all_guards</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1296" style="width: 35px; color: rgba(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="1285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1285

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<pre style="margin: 0;"> <span id="LC1285" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">else</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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

1297

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<td class="diff-line-num new_line" data-linenumber="1286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1286

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<pre style="margin: 0;"> <span id="LC1286" class="line" lang="haskell">      <span class="n" style="color: #333;">kept</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">filterM</span> <span class="n" style="color: #333;">shouldKeep</span> <span class="n" style="color: #333;">all_guards</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="1287" 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="LC1298" class="line" lang="haskell">      <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left right">fake_pat</span></span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">kept</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1299" style="width: 35px; color: rgba(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="1287" style="width: 35px; color: rgba(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="LC1287" class="line" lang="haskell">      <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">PmFake</span></span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">kept</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1288

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<pre style="margin: 0;"> <span id="LC1288" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1300" style="width: 35px; color: rgba(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="1289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1289

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<pre style="margin: 0;"> <span id="LC1289" class="line" lang="haskell"><span class="cd">-- | Check whether a pattern can fail to match</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1301" style="width: 35px; color: rgba(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="1290" style="width: 35px; color: rgba(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="LC1290" class="line" lang="haskell"><span class="n" style="color: #333;">cantFailPattern</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Pattern</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;">Bool</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1377" style="width: 35px; color: rgba(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="1366" style="width: 35px; color: rgba(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">@@ -1377,7 +1366,7 @@ cases:</td>

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<pre style="margin: 0;"> <span id="LC1366" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">          expressivity in our warnings.</span></span>

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<td class="diff-line-num old_line" data-linenumber="1378" style="width: 35px; color: rgba(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="1367" style="width: 35px; color: rgba(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="LC1367" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1379" style="width: 35px; color: rgba(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="1368" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     Hence, in this case, we replace the guard @([a,b] <- f x)@ with a *dummy*</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1380" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     @<span class="idiff left right">fake_pat</span>@: @True <- _@. That is, we record that there is a possibility</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1381" style="width: 35px; color: rgba(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="1369" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1369

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<pre style="margin: 0;">+<span id="LC1369" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     @<span class="idiff left right">PmFake</span>@: @True <- _@. That is, we record that there is a possibility</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1381" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1381

</td>

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

1370

</td>

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<pre style="margin: 0;"> <span id="LC1370" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     of failure but we minimize it to a True/False. This generates a single</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1382" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1382

</td>

<td class="diff-line-num new_line" data-linenumber="1371" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1371

</td>

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<pre style="margin: 0;"> <span id="LC1371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     warning and much smaller uncovered sets.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1383" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1383

</td>

<td class="diff-line-num new_line" data-linenumber="1372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1372

</td>

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<pre style="margin: 0;"> <span id="LC1372" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1421" style="width: 35px; color: rgba(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="1410" style="width: 35px; color: rgba(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">@@ -1421,7 +1410,7 @@ in the pattern bind case). Hence, we safely drop them.</td>

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<td class="diff-line-num old_line" data-linenumber="1421" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1421

</td>

<td class="diff-line-num new_line" data-linenumber="1410" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1410

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<pre style="margin: 0;"> <span id="LC1410" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1422" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1422

</td>

<td class="diff-line-num new_line" data-linenumber="1411" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1411

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<pre style="margin: 0;"> <span id="LC1411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Additionally, top-level guard translation (performed by @translateGuards@)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1423" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1423

</td>

<td class="diff-line-num new_line" data-linenumber="1412" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1412

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<pre style="margin: 0;"> <span id="LC1412" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">replaces guards that cannot be reasoned about (like the ones we described in</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1424" 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">

1424

</td>

<td class="diff-line-num new_line old" data-linenumber="1413" 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="LC1424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1-4) with a single @<span class="idiff left right">fake_pat</span>@ to record the possibility of failure to match.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1425" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1413" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1413

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<pre style="margin: 0;">+<span id="LC1413" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1-4) with a single @<span class="idiff left right">PmFake</span>@ to record the possibility of failure to match.</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1425" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1425

</td>

<td class="diff-line-num new_line" data-linenumber="1414" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1414

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<pre style="margin: 0;"> <span id="LC1414" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1426" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1426

</td>

<td class="diff-line-num new_line" data-linenumber="1415" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1415

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<pre style="margin: 0;"> <span id="LC1415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Translate CoPats]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1427

</td>

<td class="diff-line-num new_line" data-linenumber="1416" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1416

</td>

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<pre style="margin: 0;"> <span id="LC1416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1457" style="width: 35px; color: rgba(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="1446" style="width: 35px; color: rgba(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">@@ -1457,6 +1446,7 @@ pmPatType (PmNLit { pm_lit_id  = x }) = idType x</td>

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<td class="diff-line-num old_line" data-linenumber="1457" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1457

</td>

<td class="diff-line-num new_line" data-linenumber="1446" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1446

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<pre style="margin: 0;"> <span id="LC1446" class="line" lang="haskell"><span class="n" style="color: #333;">pmPatType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span>  <span class="p">{</span> <span class="n" style="color: #333;">pm_grd_pv</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pv</span> <span class="p">})</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1458" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1458

</td>

<td class="diff-line-num new_line" data-linenumber="1447" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1447

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<pre style="margin: 0;"> <span id="LC1447" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span><span class="n" style="color: #333;">patVecArity</span> <span class="n" style="color: #333;">pv</span> <span class="o" style="font-weight: 600;">==</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">pmPatType</span> <span class="n" style="color: #333;">p</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1459" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1459

</td>

<td class="diff-line-num new_line" data-linenumber="1448" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1448

</td>

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<pre style="margin: 0;"> <span id="LC1448" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">find</span> <span class="p">((</span><span class="o" style="font-weight: 600;">==</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">patternArity</span><span class="p">)</span> <span class="n" style="color: #333;">pv</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1460" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1449" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1449

</td>

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<pre style="margin: 0;">+<span id="LC1449" class="line" lang="haskell"><span class="n" style="color: #333;">pmPatType</span> <span class="kt" style="color: #458; font-weight: 600;">PmFake</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pmPatType</span> <span class="n" style="color: #333;">truePattern</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1460" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1460

</td>

<td class="diff-line-num new_line" data-linenumber="1450" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1450

</td>

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

<pre style="margin: 0;"> <span id="LC1450" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new_line" data-linenumber="1451" style="width: 35px; color: rgba(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="LC1451" class="line" lang="haskell"><span class="cd">-- | Information about a conlike that is relevant to coverage checking.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1462" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1462

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<td class="diff-line-num new_line" data-linenumber="1452" style="width: 35px; color: rgba(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="LC1452" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- It is called an \"inhabitation candidate\" since it is a value which may</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1679" style="width: 35px; color: rgba(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="1669" style="width: 35px; color: rgba(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">@@ -1679,7 +1669,7 @@ mkGuard pv e = do</td>

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<pre style="margin: 0;"> <span id="LC1669" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hsExprToPmExpr</span> <span class="n" style="color: #333;">e</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1680" style="width: 35px; color: rgba(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="1670" style="width: 35px; color: rgba(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="LC1670" class="line" lang="haskell">  <span class="n" style="color: #333;">tracePmD</span> <span class="s" style="color: #d14;">"mkGuard"</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;">pv</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">e</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">res</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">expr</span><span class="p">])</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1671" style="width: 35px; color: rgba(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="LC1671" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">if</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">res</span>                    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="n" style="color: #333;">pv</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1682" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="1672" 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="LC1682" class="line" lang="haskell">     <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;"><span class="idiff left right">fake_pat</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1683" style="width: 35px; color: rgba(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="LC1672" class="line" lang="haskell">     <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">PmFake</span></span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1673" style="width: 35px; color: rgba(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="LC1673" class="line" lang="haskell">     <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>              <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="n" style="color: #333;">pv</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1684" style="width: 35px; color: rgba(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="1674" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1674

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<pre style="margin: 0;"> <span id="LC1674" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1685" style="width: 35px; color: rgba(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="1675" style="width: 35px; color: rgba(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="LC1675" class="line" lang="haskell"><span class="cd">-- | Create a term equality of the form: `(False ~ (x ~ lit))`</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1753" style="width: 35px; color: rgba(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="1743" style="width: 35px; color: rgba(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">@@ -1753,6 +1743,7 @@ coercePmPat (PmCon { pm_con_con = con, pm_con_arg_tys = arg_tys</td>

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1743

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<pre style="margin: 0;"> <span id="LC1743" class="line" lang="haskell">           <span class="p">,</span> <span class="n" style="color: #333;">pm_con_tvs</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">pm_con_dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dicts</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1754" style="width: 35px; color: rgba(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="1744" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1744

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<pre style="margin: 0;"> <span id="LC1744" class="line" lang="haskell">           <span class="p">,</span> <span class="n" style="color: #333;">pm_con_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercePatVec</span> <span class="n" style="color: #333;">args</span> <span class="p">}]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1755" style="width: 35px; color: rgba(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="1745" style="width: 35px; color: rgba(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="LC1745" class="line" lang="haskell"><span class="n" style="color: #333;">coercePmPat</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="kt" style="color: #458; font-weight: 600;">[]</span> <span class="c1" style="color: #998; font-style: italic;">-- drop the guards</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1756" style="width: 35px; color: rgba(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="1746" style="width: 35px; color: rgba(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="LC1746" class="line" lang="haskell"><span class="n" style="color: #333;">coercePmPat</span> <span class="kt" style="color: #458; font-weight: 600;">PmFake</span>     <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="c1" style="color: #998; font-style: italic;">-- drop the guards</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1747

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<pre style="margin: 0;"> <span id="LC1747" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1757" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1757

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<td class="diff-line-num new_line" data-linenumber="1748" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1748

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<pre style="margin: 0;"> <span id="LC1748" class="line" lang="haskell"><span class="cd">-- | Check whether a 'ConLike' has the /single match/ property, i.e. whether</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1758" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1758

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<td class="diff-line-num new_line" data-linenumber="1749" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1749

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<pre style="margin: 0;"> <span id="LC1749" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- it is the only possible match in the given context. See also</span></span>

</pre>

</td>

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

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1765" style="width: 35px; color: rgba(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="1756" style="width: 35px; color: rgba(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">@@ -1765,7 +1756,7 @@ singleMatchConstructor cl tys =</td>

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<td class="diff-line-num old_line" data-linenumber="1765" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1765

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<td class="diff-line-num new_line" data-linenumber="1756" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1756

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<pre style="margin: 0;"> <span id="LC1756" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Single match constructors]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1766" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1766

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<td class="diff-line-num new_line" data-linenumber="1757" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1757

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<pre style="margin: 0;"> <span id="LC1757" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1767" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1767

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<td class="diff-line-num new_line" data-linenumber="1758" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1758

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<pre style="margin: 0;"> <span id="LC1758" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When translating pattern guards for consumption by the checker, we desugar</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1768" 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">

1768

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<td class="diff-line-num new_line old" data-linenumber="1759" 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="LC1768" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">every pattern guard that might fail ('cantFailPattern') to '<span class="idiff left right">fake_pat</span>'</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1769" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1759" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1759

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<pre style="margin: 0;">+<span id="LC1759" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">every pattern guard that might fail ('cantFailPattern') to '<span class="idiff left right">PmFake</span>'</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1769" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1769

</td>

<td class="diff-line-num new_line" data-linenumber="1760" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1760

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<pre style="margin: 0;"> <span id="LC1760" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(True <- _). Which patterns can't fail? Exactly those that only match on</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1770" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1770

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<td class="diff-line-num new_line" data-linenumber="1761" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1761

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<pre style="margin: 0;"> <span id="LC1761" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'singleMatchConstructor's.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1771" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1771

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<td class="diff-line-num new_line" data-linenumber="1762" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1762

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<pre style="margin: 0;"> <span id="LC1762" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2023" style="width: 35px; color: rgba(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="2014" style="width: 35px; color: rgba(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">@@ -2023,13 +2014,15 @@ pmcheck [] guards vva@(ValVec [] _)</td>

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<td class="diff-line-num old_line" data-linenumber="2023" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2023

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<td class="diff-line-num new_line" data-linenumber="2014" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2014

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<pre style="margin: 0;"> <span id="LC2014" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pmcheckGuardsI</span> <span class="n" style="color: #333;">guards</span> <span class="n" style="color: #333;">vva</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2024" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2024

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<td class="diff-line-num new_line" data-linenumber="2015" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2015

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<pre style="margin: 0;"> <span id="LC2015" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2025" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2025

</td>

<td class="diff-line-num new_line" data-linenumber="2016" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2016

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<pre style="margin: 0;"> <span id="LC2016" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Guard</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2026" 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">

2026

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<td class="diff-line-num new_line old" data-linenumber="2017" 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="LC2026" class="line" lang="haskell"><span class="n" style="color: #333;">pmcheck</span> <span class="p">(</span><span class="n" style="color: #333;">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="n" style="color: #333;">pv</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">ps</span><span class="p">)</span> <span class="n" style="color: #333;">guards</span> <span class="n" style="color: #333;">vva</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="n" style="color: #333;">vas</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2027" 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">

2027

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<td class="diff-line-num new_line old" data-linenumber="2017" 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="LC2027" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- short-circuit if the guard pattern is useless.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2028" 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">

2028

</td>

<td class="diff-line-num new_line old" data-linenumber="2017" 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="LC2028" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- we just have two possible outcomes: fail here or match and recurse</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2029" 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">

2029

</td>

<td class="diff-line-num new_line old" data-linenumber="2017" 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="LC2029" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- none of the two contains any useful information about the failure</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2030" 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">

2030

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<td class="diff-line-num new_line old" data-linenumber="2017" 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="LC2030" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- though. So just have these two cases but do not do all the boilerplate</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2031" 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">

2031

</td>

<td class="diff-line-num new_line old" data-linenumber="2017" 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="LC2031" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFakeGuard</span> <span class="n" style="color: #333;">pv</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">forces</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mkCons</span> <span class="n" style="color: #333;">vva</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">pmcheckI</span> <span class="n" style="color: #333;">ps</span> <span class="n" style="color: #333;">guards</span> <span class="n" style="color: #333;">vva</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2032" 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">

2032

</td>

<td class="diff-line-num new_line old" data-linenumber="2017" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC2032" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2017" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2017

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<pre style="margin: 0;">+<span id="LC2017" class="line" lang="haskell"><span class="n" style="color: #333;">pmcheck</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmFake</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">ps</span><span class="p">)</span> <span class="n" style="color: #333;">guards</span> <span class="n" style="color: #333;">vva</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="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2018" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2018

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<pre style="margin: 0;">+<span id="LC2018" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- short-circuit if the guard pattern is useless.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2019" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2019

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<pre style="margin: 0;">+<span id="LC2019" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- we just have two possible outcomes: fail here or match and recurse</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2020

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<pre style="margin: 0;">+<span id="LC2020" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- none of the two contains any useful information about the failure</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2021" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2021

</td>

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<pre style="margin: 0;">+<span id="LC2021" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- though. So just have these two cases but do not do all the boilerplate</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2022" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2022

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<pre style="margin: 0;">+<span id="LC2022" class="line" lang="haskell">  <span class="n" style="color: #333;">forces</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mkCons</span> <span class="n" style="color: #333;">vva</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">pmcheckI</span> <span class="n" style="color: #333;">ps</span> <span class="n" style="color: #333;">guards</span> <span class="n" style="color: #333;">vva</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2023" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2023

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<pre style="margin: 0;">+<span id="LC2023" class="line" lang="haskell"><span class="n" style="color: #333;">pmcheck</span> <span class="p">(</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">ps</span><span class="p">)</span> <span class="n" style="color: #333;">guards</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="n" style="color: #333;">vas</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2024" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2024

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<pre style="margin: 0;">+<span id="LC2024" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="p">{</span> <span class="n" style="color: #333;">pm_grd_pv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pv</span><span class="p">,</span> <span class="n" style="color: #333;">pm_grd_expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">p</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2025" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2025

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<pre style="margin: 0;">+<span id="LC2025" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2033

</td>

<td class="diff-line-num new_line" data-linenumber="2026" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2026

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

<pre style="margin: 0;"> <span id="LC2026" class="line" lang="haskell">      <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">liftD</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkPmId</span> <span class="p">(</span><span class="n" style="color: #333;">pmPatType</span> <span class="n" style="color: #333;">p</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2034" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2034

</td>

<td class="diff-line-num new_line" data-linenumber="2027" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2027

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<pre style="margin: 0;"> <span id="LC2027" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">tm_state</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendSubst</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2035" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2035

</td>

<td class="diff-line-num new_line" data-linenumber="2028" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2028

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

<pre style="margin: 0;"> <span id="LC2028" class="line" lang="haskell">          <span class="n" style="color: #333;">delta'</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">delta</span> <span class="p">{</span> <span class="n" style="color: #333;">delta_tm_cs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tm_state</span> <span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2182" style="width: 35px; color: rgba(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="2175" style="width: 35px; color: rgba(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">@@ -2182,6 +2175,7 @@ pmcheckHd (p@(PmCon {})) ps guards (PmNLit { pm_lit_id = x }) vva</td>

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<td class="diff-line-num old_line" data-linenumber="2182" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2182

</td>

<td class="diff-line-num new_line" data-linenumber="2175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2175

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<pre style="margin: 0;"> <span id="LC2175" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pmcheckHdI</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">ps</span> <span class="n" style="color: #333;">guards</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">vva</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2183" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2183

</td>

<td class="diff-line-num new_line" data-linenumber="2176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2176

</td>

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

<pre style="margin: 0;"> <span id="LC2176" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="2184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2184

</td>

<td class="diff-line-num new_line" data-linenumber="2177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2177

</td>

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<pre style="margin: 0;"> <span id="LC2177" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Impossible: handled by pmcheck</span></span>

</pre>

</td>

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

<td class="diff-line-num new old_line" data-linenumber="2185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2178

</td>

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<pre style="margin: 0;">+<span id="LC2178" class="line" lang="haskell"><span class="n" style="color: #333;">pmcheckHd</span> <span class="kt" style="color: #458; font-weight: 600;">PmFake</span>     <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</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;">panic</span> <span class="s" style="color: #d14;">"pmcheckHd: Fake"</span></span>

</pre>

</td>

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

<td class="diff-line-num old_line" data-linenumber="2185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2185

</td>

<td class="diff-line-num new_line" data-linenumber="2179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2179

</td>

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<pre style="margin: 0;"> <span id="LC2179" class="line" lang="haskell"><span class="n" style="color: #333;">pmcheckHd</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="p">{})</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</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;">panic</span> <span class="s" style="color: #d14;">"pmcheckHd: Guard"</span></span>

</pre>

</td>

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

<td class="diff-line-num old_line" data-linenumber="2186" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2186

</td>

<td class="diff-line-num new_line" data-linenumber="2180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2180

</td>

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

<pre style="margin: 0;"> <span id="LC2180" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="2187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2187

</td>

<td class="diff-line-num new_line" data-linenumber="2181" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2181

</td>

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

<pre style="margin: 0;"> <span id="LC2181" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2742" style="width: 35px; color: rgba(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="2736" style="width: 35px; color: rgba(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">@@ -2742,6 +2736,7 @@ pprPmPatDebug (PmLit li)  = text "PmLit" <+> ppr li</td>

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<td class="diff-line-num old_line" data-linenumber="2742" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2742

</td>

<td class="diff-line-num new_line" data-linenumber="2736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2736

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<pre style="margin: 0;"> <span id="LC2736" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmPatDebug</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmNLit</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">nl</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"PmNLit"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">nl</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2743" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2743

</td>

<td class="diff-line-num new_line" data-linenumber="2737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2737

</td>

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<pre style="margin: 0;"> <span id="LC2737" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmPatDebug</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="n" style="color: #333;">pv</span> <span class="n" style="color: #333;">ge</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"PmGrd"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">hsep</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">pprPmPatDebug</span> <span class="n" style="color: #333;">pv</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2744" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2744

</td>

<td class="diff-line-num new_line" data-linenumber="2738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2738

</td>

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<pre style="margin: 0;"> <span id="LC2738" class="line" lang="haskell">                                           <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ge</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="2745" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2739

</td>

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<pre style="margin: 0;">+<span id="LC2739" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmPatDebug</span> <span class="kt" style="color: #458; font-weight: 600;">PmFake</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"PmFake"</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2745" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2745

</td>

<td class="diff-line-num new_line" data-linenumber="2740" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2740

</td>

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

<pre style="margin: 0;"> <span id="LC2740" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2746" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2746

</td>

<td class="diff-line-num new_line" data-linenumber="2741" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2741

</td>

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

<pre style="margin: 0;"> <span id="LC2741" class="line" lang="haskell"><span class="n" style="color: #333;">pprPatVec</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PatVec</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2747

</td>

<td class="diff-line-num new_line" data-linenumber="2742" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2742

</td>

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

<pre style="margin: 0;"> <span id="LC2742" class="line" lang="haskell"><span class="n" style="color: #333;">pprPatVec</span> <span class="n" style="color: #333;">ps</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Pattern:"</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span></span>

</pre>

</td>

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