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<h3>

Ben Gamari pushed to branch wip/T16728

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/8651c6e99299f5b6f5e2722267f4ee30d8d10f6c">8651c6e9</a></strong>

<div>

<span>by Simon Peyton Jones</span>

<i>at 2019-06-13T23:35:32Z</i>

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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Comments and tiny refactor

* Added Note [Quantified varaibles in partial type signatures]

  in TcRnTypes

* Kill dVarSetElemsWellScoped; it was only called in

  one function, quantifyTyVars.  I inlined it because it

  was only scopedSort . dVarSetElems

* Kill Type.tyCoVarsOfBindersWellScoped, never called.

</pre>

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<h4>3 changed files:</h4>

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<li class="file-stats">

<a href="#367db94fc37c8c7548dbe545a5302c7a5108e41e">

compiler/typecheck/TcMType.hs

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<li class="file-stats">

<a href="#d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813">

compiler/typecheck/TcRnTypes.hs

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<li class="file-stats">

<a href="#07ce9a046fb8ea6659690020b0a8551d94cfdf1c">

compiler/types/Type.hs

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<h4>Changes:</h4>

<li id="367db94fc37c8c7548dbe545a5302c7a5108e41e">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/8651c6e99299f5b6f5e2722267f4ee30d8d10f6c#367db94fc37c8c7548dbe545a5302c7a5108e41e"><strong>compiler/typecheck/TcMType.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1432" style="width: 35px; color: rgba(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="1432" style="width: 35px; color: rgba(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">@@ -1432,9 +1432,9 @@ quantifyTyVars gbl_tvs</td>

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<pre style="margin: 0;"> <span id="LC1432" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- NB: All variables in the kind of a covar must not be</span></span>

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<pre style="margin: 0;"> <span id="LC1433" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- quantified over, as we don't quantify over the covar.</span></span>

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<pre style="margin: 0;"> <span id="LC1434" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC1435" class="line" lang="haskell">             <span class="n" style="color: #333;">dep_kvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">dVarSetElemsWellScoped</span></span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">+<span id="LC1435" class="line" lang="haskell">             <span class="n" style="color: #333;">dep_kvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">scopedSort</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">dVarSetElems</span></span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC1436" class="line" lang="haskell">                       <span class="n" style="color: #333;">dep_tkvs</span> <span class="p">`</span><span class="n" style="color: #333;">dVarSetMinusVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">mono_tvs</span></span>

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<pre style="margin: 0;">-<span id="LC1437" class="line" lang="haskell">                       <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">dVarSetElemsWellScoped</span>: put the kind variables into</span></span>

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<pre style="margin: 0;">+<span id="LC1437" class="line" lang="haskell">                       <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">scopedSort</span>: put the kind variables into</span></span>

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<pre style="margin: 0;"> <span id="LC1438" class="line" lang="haskell">                       <span class="c1" style="color: #998; font-style: italic;">--    well-scoped order.</span></span>

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<pre style="margin: 0;"> <span id="LC1439" class="line" lang="haskell">                       <span class="c1" style="color: #998; font-style: italic;">--    E.g.  [k, (a::k)] not the other way roud</span></span>

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<pre style="margin: 0;"> <span id="LC1440" class="line" lang="haskell"></span>

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

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1452,7 +1452,7 @@ quantifyTyVars gbl_tvs</td>

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<pre style="margin: 0;"> <span id="LC1452" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC1453" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- This block uses level numbers to decide what to quantify</span></span>

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<pre style="margin: 0;"> <span id="LC1454" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- and emits a warning if the two methods do not give the same answer</span></span>

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<pre style="margin: 0;">-<span id="LC1455" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">dep_kvs2</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">dVarSetElemsWellScoped</span></span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">+<span id="LC1455" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">dep_kvs2</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">scopedSort</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">dVarSetElems</span></span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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1456

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<pre style="margin: 0;"> <span id="LC1456" class="line" lang="haskell">                           <span class="n" style="color: #333;">filterDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">quantifiableTv</span> <span class="n" style="color: #333;">outer_tclvl</span><span class="p">)</span> <span class="n" style="color: #333;">dep_tkvs</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1457" class="line" lang="haskell">             <span class="n" style="color: #333;">nondep_tvs2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filter</span> <span class="p">(</span><span class="n" style="color: #333;">quantifiableTv</span> <span class="n" style="color: #333;">outer_tclvl</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1458" class="line" lang="haskell">                           <span class="n" style="color: #333;">dVarSetElems</span> <span class="p">(</span><span class="n" style="color: #333;">nondep_tkvs</span> <span class="p">`</span><span class="n" style="color: #333;">minusDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">dep_tkvs</span><span class="p">)</span></span>

</pre>

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<br>

</li>

<li id="d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/8651c6e99299f5b6f5e2722267f4ee30d8d10f6c#d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813"><strong>compiler/typecheck/TcRnTypes.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1542" style="width: 35px; color: rgba(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="1542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<pre style="margin: 0;"> <span id="LC1542" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- No need to keep track of whether they are truly lexically</span></span>

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<pre style="margin: 0;"> <span id="LC1543" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">--   scoped because the renamer has named them uniquely</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1544" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- See Note [Binding scoped type variables] in TcSigs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1545" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1546" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- NB: The order of sig_inst_skols is irrelevant</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1547" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">--     for a CompleteSig, but for a PartialSig see</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1548" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">--     Note [Quantified varaibles in partial type signatures]</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1549" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1549

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<pre style="margin: 0;"> <span id="LC1549" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1550" style="width: 35px; color: rgba(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="LC1550" class="line" lang="haskell">         <span class="p">,</span> <span class="n" style="color: #333;">sig_inst_theta</span>  <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcThetaType</span></span>

</pre>

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1547

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<pre style="margin: 0;"> <span id="LC1551" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- Instantiated theta.  In the case of a</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1553" style="width: 35px; color: rgba(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="1557" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<pre style="margin: 0;"> <span id="LC1557" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1558" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- Relevant for partial signature only</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1559" class="line" lang="haskell">         <span class="p">,</span> <span class="n" style="color: #333;">sig_inst_wcs</span>   <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVar</span><span class="p">)]</span></span>

</pre>

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1556

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<td class="diff-line-num new_line old" data-linenumber="1560" 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="LC1556" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- Like sig_inst_skols, but for <span class="idiff left right">wildcards.  The named</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1557" 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">

1557

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<td class="diff-line-num new_line old" data-linenumber="1560" 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="LC1557" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">wildcards scope over the binding, and hence their</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1558" 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">

1558

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<td class="diff-line-num new_line old" data-linenumber="1560" 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="LC1558" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- Names may appear in type signatures in the binding</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1559" style="width: 35px; color: rgba(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="1560" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1560

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<pre style="margin: 0;">+<span id="LC1560" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- Like sig_inst_skols, but for <span class="idiff left right">/named/ wildcards (_a etc).</span></span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1561" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1561

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<pre style="margin: 0;">+<span id="LC1561" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">The named wildcards scope over the binding, and hence</span></span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1562" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1562

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<pre style="margin: 0;">+<span id="LC1562" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">their </span>Names may appear in type signatures in the binding</span></span>

</pre>

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1559

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<td class="diff-line-num new_line" data-linenumber="1563" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1563

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<pre style="margin: 0;"> <span id="LC1563" class="line" lang="haskell"></span>

</pre>

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1560

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1564

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<pre style="margin: 0;"> <span id="LC1564" class="line" lang="haskell">         <span class="p">,</span> <span class="n" style="color: #333;">sig_inst_wcx</span>   <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span></span>

</pre>

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1561

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<td class="diff-line-num new_line" data-linenumber="1565" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1565

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<pre style="margin: 0;"> <span id="LC1565" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- Extra-constraints wildcard to fill in, if any</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1572" style="width: 35px; color: rgba(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="1576" style="width: 35px; color: rgba(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">@@ -1572,6 +1576,26 @@ if the original function had a signature like</td>

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1572

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1576

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<pre style="margin: 0;"> <span id="LC1576" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But that's ok: tcMatchesFun (called by tcRhs) can deal with that</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1573" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1573

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<td class="diff-line-num new_line" data-linenumber="1577" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1577

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<pre style="margin: 0;"> <span id="LC1577" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">It happens, too!  See Note [Polymorphic methods] in TcClassDcl.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1574" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1574

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<td class="diff-line-num new_line" data-linenumber="1578" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1578

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<pre style="margin: 0;"> <span id="LC1578" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1579" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1579

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<pre style="margin: 0;">+<span id="LC1579" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Quantified varaibles in partial type signatures]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1580" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1580

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<pre style="margin: 0;">+<span id="LC1580" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1581" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1581

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<pre style="margin: 0;">+<span id="LC1581" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1582" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1582

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<pre style="margin: 0;">+<span id="LC1582" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   f :: forall a b. _ -> a -> _ -> b</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1583" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1583

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<pre style="margin: 0;">+<span id="LC1583" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   f (x,y) p q = q</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1584" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1584

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<pre style="margin: 0;">+<span id="LC1584" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1585

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<pre style="margin: 0;">+<span id="LC1585" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Then we expect f's final type to be</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1586" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1586

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<pre style="margin: 0;">+<span id="LC1586" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  f :: forall {x,y}. forall a b. (x,y) -> a -> b -> b</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1587" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1587

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<pre style="margin: 0;">+<span id="LC1587" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1588" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1588

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<pre style="margin: 0;">+<span id="LC1588" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that x,y are Inferred, and can't be use for visible type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1589" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1589

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<pre style="margin: 0;">+<span id="LC1589" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">application (VTA).  But a,b are Specified, and remain Specified</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1590" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1590

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<pre style="margin: 0;">+<span id="LC1590" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in the final type, so we can use VTA for them.  (Exception: if</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1591" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1591

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<pre style="margin: 0;">+<span id="LC1591" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it turns out that a's kind mentions b we need to reorder them</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1592

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<pre style="margin: 0;">+<span id="LC1592" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with scopedSort.)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1593

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<pre style="margin: 0;">+<span id="LC1593" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1594

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<pre style="margin: 0;">+<span id="LC1594" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The sig_inst_skols of the TISI from a partial signature records</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1595

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<pre style="margin: 0;">+<span id="LC1595" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that original order, and is used to get the variables of f's</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1596" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1596

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<pre style="margin: 0;">+<span id="LC1596" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">final type in the correct order.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1597" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1597

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<pre style="margin: 0;">+<span id="LC1597" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1575" style="width: 35px; color: rgba(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="1598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1598

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<pre style="margin: 0;">+<span id="LC1598" class="line" lang="haskell"></span>

</pre>

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1575

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<td class="diff-line-num new_line" data-linenumber="1599" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1599

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<pre style="margin: 0;"> <span id="LC1599" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Wildcards in partial signatures]</span></span>

</pre>

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1576

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<td class="diff-line-num new_line" data-linenumber="1600" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1600

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<pre style="margin: 0;"> <span id="LC1600" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1577" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1577

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<td class="diff-line-num new_line" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1601

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<pre style="margin: 0;"> <span id="LC1601" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The wildcards in psig_wcs may stand for a type mentioning</span></span>

</pre>

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<br>

</li>

<li id="07ce9a046fb8ea6659690020b0a8551d94cfdf1c">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/8651c6e99299f5b6f5e2722267f4ee30d8d10f6c#07ce9a046fb8ea6659690020b0a8551d94cfdf1c"><strong>compiler/types/Type.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -156,8 +156,8 @@ module Type (</td>

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<pre style="margin: 0;"> <span id="LC156" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">typeSize</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">occCheckExpand</span><span class="p">,</span></span>

</pre>

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157

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157

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

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Well-scoped lists of variables</span></span>

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<td class="diff-line-num old old_line" data-linenumber="159" 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="LC159" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left">dVarSetElemsWellScoped</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="nf" style="color: #900; font-weight: 600;">scopedSort</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypeWellScoped</span><span class="p">,</span></span>

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<pre style="margin: 0;">-<span id="LC160" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypesWellScoped</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">tyCoVarsOfBindersWellScoped</span></span><span class="p"><span class="idiff right">,</span></span></span>

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<pre style="margin: 0;">+<span id="LC159" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">scopedSort</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypeWellScoped</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypesWellScoped</span><span class="p">,</span></span>

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

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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Type comparison</span></span>

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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">eqType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">eqTypeX</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">eqTypes</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetCmpType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetCmpTypes</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetCmpTypeX</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="248" style="width: 35px; color: rgba(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="248" style="width: 35px; color: rgba(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">@@ -248,7 +248,7 @@ import UniqSet</td>

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<pre style="margin: 0;"> <span id="LC248" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Class</span></span>

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<pre style="margin: 0;"> <span id="LC249" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TyCon</span></span>

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<pre style="margin: 0;"> <span id="LC250" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TysPrim</span></span>

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<pre style="margin: 0;">-<span id="LC251" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">TysWiredIn</span> <span class="p">(</span> <span class="n" style="color: #333;">listTyCon</span><span class="p">,</span> <span class="n" style="color: #333;">typeNatKind</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">unitTy</span></span></span>

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<pre style="margin: 0;">+<span id="LC251" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">TysWiredIn</span> <span class="p">(</span> <span class="n" style="color: #333;">listTyCon</span><span class="p">,</span> <span class="n" style="color: #333;">typeNatKind</span></span>

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<pre style="margin: 0;"> <span id="LC252" class="line" lang="haskell">                                 <span class="p">,</span> <span class="n" style="color: #333;">typeSymbolKind</span><span class="p">,</span> <span class="n" style="color: #333;">liftedTypeKind</span></span>

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<pre style="margin: 0;"> <span id="LC253" class="line" lang="haskell">                                 <span class="p">,</span> <span class="n" style="color: #333;">constraintKind</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">PrelNames</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2171" style="width: 35px; color: rgba(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="2171" style="width: 35px; color: rgba(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">@@ -2171,15 +2171,6 @@ scopedSort = go [] []</td>

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2171

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2171

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<pre style="margin: 0;"> <span id="LC2171" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- lists not in correspondence</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2172" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2172

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<td class="diff-line-num new_line" data-linenumber="2172" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2172

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<pre style="margin: 0;"> <span id="LC2172" class="line" lang="haskell">    <span class="n" style="color: #333;">insert</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;">"scopedSort"</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2173" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2173

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2173

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<pre style="margin: 0;"> <span id="LC2173" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2174" 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">

2174

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2174" class="line" lang="haskell"><span class="cd">-- | Extract a well-scoped list of variables from a deterministic set of</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2175" 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">

2175

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2175" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- variables. The result is deterministic.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2176" 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">

2176

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2176" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: There used to exist varSetElemsWellScoped :: VarSet -> [Var] which</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2177" 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">

2177

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2177" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- took a non-deterministic set and produced a non-deterministic</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2178" 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">

2178

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<pre style="margin: 0;">-<span id="LC2178" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- well-scoped list. If you care about the list being well-scoped you also</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2179" 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">

2179

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2179" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- most likely care about it being in deterministic order.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2180" 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">

2180

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<pre style="margin: 0;">-<span id="LC2180" class="line" lang="haskell"><span class="n" style="color: #333;">dVarSetElemsWellScoped</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DVarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span></span>

</pre>

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2181

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2181" class="line" lang="haskell"><span class="n" style="color: #333;">dVarSetElemsWellScoped</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">scopedSort</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">dVarSetElems</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2182" 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">

2182

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<td class="diff-line-num new_line old" data-linenumber="2174" 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="LC2182" class="line" lang="haskell"></span>

</pre>

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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

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2174

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<pre style="margin: 0;"> <span id="LC2174" class="line" lang="haskell"><span class="cd">-- | Get the free vars of a type in scoped order</span></span>

</pre>

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2184

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2175

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<pre style="margin: 0;"> <span id="LC2175" class="line" lang="haskell"><span class="n" style="color: #333;">tyCoVarsOfTypeWellScoped</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span></span>

</pre>

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2185

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2176

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<pre style="margin: 0;"> <span id="LC2176" class="line" lang="haskell"><span class="n" style="color: #333;">tyCoVarsOfTypeWellScoped</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">scopedSort</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">tyCoVarsOfTypeList</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2188" style="width: 35px; color: rgba(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="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">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2188,12 +2179,6 @@ tyCoVarsOfTypeWellScoped = scopedSort . tyCoVarsOfTypeList</td>

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<pre style="margin: 0;"> <span id="LC2179" class="line" lang="haskell"><span class="n" style="color: #333;">tyCoVarsOfTypesWellScoped</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span></span>

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2189

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2180

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<pre style="margin: 0;"> <span id="LC2180" class="line" lang="haskell"><span class="n" style="color: #333;">tyCoVarsOfTypesWellScoped</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">scopedSort</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">tyCoVarsOfTypesList</span></span>

</pre>

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2190

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2181

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<pre style="margin: 0;"> <span id="LC2181" class="line" lang="haskell"></span>

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<td class="diff-line-num old old_line" data-linenumber="2191" 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">

2191

</td>

<td class="diff-line-num new_line old" data-linenumber="2182" 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="LC2191" class="line" lang="haskell"><span class="cd">-- | Given the suffix of a telescope, returns the prefix.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2192" 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">

2192

</td>

<td class="diff-line-num new_line old" data-linenumber="2182" 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="LC2192" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Ex: given [(k :: j), (a :: Proxy k)], returns [(j :: *)].</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2193" 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">

2193

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<td class="diff-line-num new_line old" data-linenumber="2182" 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="LC2193" class="line" lang="haskell"><span class="n" style="color: #333;">tyCoVarsOfBindersWellScoped</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2194" 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">

2194

</td>

<td class="diff-line-num new_line old" data-linenumber="2182" 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="LC2194" class="line" lang="haskell"><span class="n" style="color: #333;">tyCoVarsOfBindersWellScoped</span> <span class="n" style="color: #333;">tvs</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2195" 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">

2195

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<td class="diff-line-num new_line old" data-linenumber="2182" 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="LC2195" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypeWellScoped</span> <span class="p">(</span><span class="n" style="color: #333;">mkInvForAllTys</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">unitTy</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2196" 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">

2196

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<td class="diff-line-num new_line old" data-linenumber="2182" 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="LC2196" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2197

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<td class="diff-line-num new_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

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<pre style="margin: 0;"> <span id="LC2182" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------- Closing over kinds -----------------</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2198

</td>

<td class="diff-line-num new_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

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<pre style="margin: 0;"> <span id="LC2183" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2199

</td>

<td class="diff-line-num new_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

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<pre style="margin: 0;"> <span id="LC2184" class="line" lang="haskell"><span class="cd">-- | Add the kind variables free in the kinds of the tyvars in the given set.</span></span>

</pre>

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