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GitLab

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<h3>

Andrew Martin pushed to branch wip/boxed-rep

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/b5bd116b4ac2135faa3b0ebf4ef72353beb12fc4">b5bd116b</a></strong>

<div>

<span>by Andrew Martin</span>

<i>at 2020-11-18T09:28:28-05:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add tests for levity polymorphism

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fd2517505454e3c35e3f76d99a63df2a8af8c47e">fd251750</a></strong>

<div>

<span>by Andrew Martin</span>

<i>at 2020-11-18T10:02:03-05:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add table documenting built-in types

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c7d210f57e378057ec61480dfb2ba41082f69766">c7d210f5</a></strong>

<div>

<span>by Andrew Martin</span>

<i>at 2020-11-18T10:17:58-05:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix test T13963

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0dace92a5867ced6f979b4543c49865165d4c49a">0dace92a</a></strong>

<div>

<span>by Andrew Martin</span>

<i>at 2020-11-18T10:19:53-05:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update the user manual

</pre>

</li>

</ul>

<h4>14 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#377cfd14c1f92357465df995ec6537b074051322">

compiler/GHC/Builtin/Types.hs

</a>

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<li class="file-stats">

<a href="#d87dfc77856eeaef6134e28336290ddcbcf18d7d">

docs/users_guide/9.2.1-notes.rst

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<li class="file-stats">

<a href="#18cb633f983e925652bddc4c6bd1a23fbef8e01c">

docs/users_guide/exts/levity_polymorphism.rst

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<a href="#915e4cd0ff4c05278c1d4b529ae8997ea58835f0">

docs/users_guide/exts/typed_holes.rst

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<li class="file-stats">

<a href="#3ebfc492d70160394bfaca1d5eb35f389fdce61d">

testsuite/tests/ghci/scripts/T13963.script

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<a href="#d42150135717c65d60817d669b5015c71ebbd77c">

testsuite/tests/ghci/scripts/T13963.stdout

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<li class="file-stats">

<a href="#c47148a3e80c82f6d87408a9cd54b053aa8f830b">

<span class="new-file">

+

testsuite/tests/typecheck/should_compile/LevPolyResult.hs

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<li class="file-stats">

<a href="#34fe7bf0e6fbf60effb28393399ba68666593909">

testsuite/tests/typecheck/should_compile/all.T

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<a href="#ce2724903dd9d0c17f56742c7378d51383547982">

<span class="new-file">

+

testsuite/tests/typecheck/should_fail/LevPolyLet.hs

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<li class="file-stats">

<a href="#88ce4e57d7b4597f1d2cca94da35daa43cae3d8b">

<span class="new-file">

+

testsuite/tests/typecheck/should_fail/LevPolyLet.stderr

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</a>

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<li class="file-stats">

<a href="#b9e86d897a62509b0114d81d5e736630d6f68f43">

testsuite/tests/typecheck/should_fail/all.T

</a>

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<li class="file-stats">

<a href="#09542c788b655f0aa4f986428f56a30a2832f6b2">

<span class="new-file">

+

testsuite/tests/typecheck/should_run/LevPolyResultInst.hs

</span>

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</li>

<li class="file-stats">

<a href="#4ebb79701c0fa02f610954161e711f341a3704b1">

<span class="new-file">

+

testsuite/tests/typecheck/should_run/LevPolyResultInst.stdout

</span>

</a>

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<li class="file-stats">

<a href="#8db0e99055bd439c988ea726deb76570d8736a55">

testsuite/tests/typecheck/should_run/all.T

</a>

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<h4>Changes:</h4>

<li id="377cfd14c1f92357465df995ec6537b074051322">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#377cfd14c1f92357465df995ec6537b074051322"><strong>compiler/GHC/Builtin/Types.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="215" style="width: 35px; color: rgba(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="215" style="width: 35px; color: rgba(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">@@ -215,6 +215,41 @@ to this Note, so a search for this Note's name should find all the lists.</td>

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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="216" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

216

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<pre style="margin: 0;"> <span id="LC216" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See also Note [Getting from RuntimeRep to PrimRep] in GHC.Types.RepType.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="217" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

217

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217

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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC218" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Wired-in Types and Type Constructors]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC220" 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="218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="221" style="width: 35px; color: rgba(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="LC221" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="222" style="width: 35px; color: rgba(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="LC222" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This module include a lot of wired-in types and type constructors. Here,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="223" style="width: 35px; color: rgba(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="LC223" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">these are presented in a tabular format to make it easier to find the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="224" style="width: 35px; color: rgba(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="LC224" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">wired-in type identifier corresponding to a known Haskell type. Data</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="225" style="width: 35px; color: rgba(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="LC225" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">constructors are nested under their corresponding types with two spaces</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC226" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of indentation.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC227" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC228" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Identifier              Type    Haskell name          Notes</span></span>

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<pre style="margin: 0;">+<span id="LC229" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">----------------------------------------------------------------------------</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC230" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">liftedTypeKindTyCon     TyCon   GHC.Types.Type        Synonym for: TYPE LiftedRep</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC231" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">liftedRepTyCon          TyCon   GHC.Types.LiftedRep   Synonym for: 'BoxedRep 'Lifted</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC232" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">levityTyCon             TyCon   GHC.Types.Levity      Data type</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC233" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  liftedDataConTyCon    TyCon   GHC.Types.Lifted      Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC234" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  unliftedDataConTyCon  TyCon   GHC.Types.Unlifted    Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC235" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">vecCountTyCon           TyCon   GHC.Types.VecCount    Data type</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC236" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  vec2DataConTy         Type    GHC.Types.Vec2        Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  vec4DataConTy         Type    GHC.Types.Vec4        Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC238" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  vec8DataConTy         Type    GHC.Types.Vec8        Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC239" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  vec16DataConTy        Type    GHC.Types.Vec16       Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC240" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  vec32DataConTy        Type    GHC.Types.Vec32       Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC241" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  vec64DataConTy        Type    GHC.Types.Vec64       Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC242" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">runtimeRepTyCon         TyCon   GHC.Types.RuntimeRep  Data type</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC243" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  boxedRepDataConTyCon  TyCon   GHC.Types.BoxedRep    Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC244" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  intRepDataConTy       Type    GHC.Types.IntRep      Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC245" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  doubleRepDataConTy    Type    GHC.Types.DoubleRep   Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC246" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  floatRepDataConTy     Type    GHC.Types.FloatRep    Data constructor</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC247" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">boolTyCon               TyCon   GHC.Types.Bool        Data type</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC248" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  trueDataCon           DataCon GHC.Types.True        Data constructor</span></span>

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<pre style="margin: 0;">+<span id="LC249" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  falseDataCon          DataCon GHC.Types.False       Data constructor</span></span>

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<pre style="margin: 0;">+<span id="LC250" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  promotedTrueDataCon   TyCon   GHC.Types.True        Data constructor</span></span>

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<pre style="margin: 0;">+<span id="LC251" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  promotedFalseDataCon  TyCon   GHC.Types.False       Data constructor</span></span>

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<pre style="margin: 0;">+<span id="LC252" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC253" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

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<pre style="margin: 0;"> <span id="LC255" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">\subsection{Wired in type constructors}</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="258" style="width: 35px; color: rgba(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">@@ -223,8 +258,10 @@ See also Note [Getting from RuntimeRep to PrimRep] in GHC.Types.RepType.</td>

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<pre style="margin: 0;"> <span id="LC258" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC259" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">If you change which things are wired in, make sure you change their</span></span>

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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">names in GHC.Builtin.Names, so they use wTcQual, wDataQual, etc</span></span>

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<pre style="margin: 0;">+<span id="LC261" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC262" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

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<pre style="margin: 0;"> <span id="LC263" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC264" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC265" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This list is used only to define GHC.Builtin.Utils.wiredInThings. That in turn</span></span>

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<pre style="margin: 0;"> <span id="LC266" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- is used to initialise the name environment carried around by the renamer.</span></span>

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<pre style="margin: 0;"> <span id="LC267" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This means that if we look up the name of a TyCon (or its implicit binders)</span></span>

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</li>

<li id="d87dfc77856eeaef6134e28336290ddcbcf18d7d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#d87dfc77856eeaef6134e28336290ddcbcf18d7d"><strong>docs/users_guide/9.2.1-notes.rst</strong></a>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext">  <https://www.microsoft.com/en-us/research/publication/a-quick-look-at-impredicativity/>`__</span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">  (Serrano et al, ICFP 2020).  More information here: :ref:`impredicative-polymorphism`.</span>

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="plaintext">  This replaces the old (undefined, flaky) behaviour of the :extension:`ImpredicativeTypes` extension.</span>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext">* The first stage of the `Pointer Rep Proposal`_ has been implemented. All</span>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext">  boxed types, both lifted and unlifted, now have representation kinds of</span>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext">  the shape ``BoxedRep r``. Code that references ``LiftedRep`` and ``UnliftedRep``</span>

</pre>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext">  will need to be updated.</span>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="plaintext">.. _Pointer Rep Proposal: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0203-pointer-rep.rst</span>

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

</pre>

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

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext">~~~~~~~~</span>

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<br>

</li>

<li id="18cb633f983e925652bddc4c6bd1a23fbef8e01c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#18cb633f983e925652bddc4c6bd1a23fbef8e01c"><strong>docs/users_guide/exts/levity_polymorphism.rst</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="13" style="width: 35px; color: rgba(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="13" style="width: 35px; color: rgba(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">@@ -13,21 +13,25 @@ Here are the key definitions, all available from ``GHC.Exts``: ::</td>

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

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">  TYPE :: RuntimeRep -> Type   -- highly magical, built into GHC</span>

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC16" class="line" lang="plaintext">  data RuntimeRep = LiftedRep     -- for things like `Int`</span>

</pre>

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<pre style="margin: 0;">-<span id="LC17" class="line" lang="plaintext">                  | UnliftedRep   -- for things like `Array#`</span>

</pre>

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<pre style="margin: 0;">-<span id="LC18" class="line" lang="plaintext">                  | IntRep        -- for `Int#`</span>

</pre>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext">  data Levity = Lifted    -- for things like `Int`</span>

</pre>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext">              | Unlifted  -- for things like `Array#`</span>

</pre>

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

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext">  data RuntimeRep = BoxedRep Levity  -- for anything represented by a GC-managed pointer</span>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext">                  | IntRep           -- for `Int#`</span>

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<pre style="margin: 0;"> <span id="LC21" class="line" lang="plaintext">                  | TupleRep [RuntimeRep]  -- unboxed tuples, indexed by the representations of the elements</span>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="plaintext">                  | SumRep [RuntimeRep]    -- unboxed sums, indexed by the representations of the disjuncts</span>

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

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="plaintext">  type LiftedRep = BoxedRep Lifted</span>

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

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="plaintext">  type Type = TYPE LiftedRep    -- Type is just an ordinary type synonym</span>

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<pre style="margin: 0;"> <span id="LC28" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="plaintext">The idea is that we have a new fundamental type constant ``TYPE``, which</span>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="plaintext">is parameterised by a ``RuntimeRep``. We thus get ``Int# :: TYPE 'IntRep``</span>

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<pre style="margin: 0;">-<span id="LC27" class="line" lang="plaintext">and ``Bool :: TYPE <span class="idiff left right">'</span>LiftedRep``. Anything with a type of the form</span>

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext">and ``Bool :: TYPE LiftedRep``. Anything with a type of the form</span>

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<pre style="margin: 0;"> <span id="LC32" class="line" lang="plaintext">``TYPE x`` can appear to either side of a function arrow ``->``. We can</span>

</pre>

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<pre style="margin: 0;"> <span id="LC33" class="line" lang="plaintext">thus say that ``->`` has type</span>

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<pre style="margin: 0;">-<span id="LC30" class="line" lang="plaintext">``TYPE r1 -> TYPE r2 -> TYPE <span class="idiff left right">'</span>LiftedRep``. The result is always lifted</span>

</pre>

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="plaintext">``TYPE r1 -> TYPE r2 -> TYPE LiftedRep``. The result is always lifted</span>

</pre>

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<pre style="margin: 0;"> <span id="LC35" class="line" lang="plaintext">because all functions are lifted in GHC.</span>

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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="plaintext">.. _levity-polymorphic-restrictions:</span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -102,13 +106,13 @@ Printing levity-polymorphic types</td>

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<pre style="margin: 0;"> <span id="LC106" class="line" lang="plaintext">    :category: verbosity</span>

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<pre style="margin: 0;"> <span id="LC107" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC108" class="line" lang="plaintext">    Print ``RuntimeRep`` parameters as they appear; otherwise, they are</span>

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<pre style="margin: 0;">-<span id="LC105" class="line" lang="plaintext">    defaulted to ``<span class="idiff left right">'</span>LiftedRep``.</span>

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<pre style="margin: 0;">+<span id="LC109" class="line" lang="plaintext">    defaulted to ``LiftedRep``.</span>

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<pre style="margin: 0;"> <span id="LC110" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="plaintext">Most GHC users will not need to worry about levity polymorphism</span>

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<pre style="margin: 0;"> <span id="LC112" class="line" lang="plaintext">or unboxed types. For these users, seeing the levity polymorphism</span>

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<pre style="margin: 0;"> <span id="LC113" class="line" lang="plaintext">in the type of ``$`` is unhelpful. And thus, by default, it is suppressed,</span>

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<pre style="margin: 0;">-<span id="LC110" class="line" lang="plaintext">by supposing all type variables of type ``RuntimeRep`` to be ``<span class="idiff left right">'</span>LiftedRep``</span>

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<pre style="margin: 0;">-<span id="LC111" class="line" lang="plaintext">when printing, and printing ``TYPE <span class="idiff left right">'</span>LiftedRep`` as ``Type`` (or ``*`` when</span>

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<pre style="margin: 0;">+<span id="LC114" class="line" lang="plaintext">by supposing all type variables of type ``RuntimeRep`` to be ``LiftedRep``</span>

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<pre style="margin: 0;">+<span id="LC115" class="line" lang="plaintext">when printing, and printing ``TYPE LiftedRep`` as ``Type`` (or ``*`` when</span>

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<pre style="margin: 0;"> <span id="LC116" class="line" lang="plaintext">:extension:`StarIsType` is on).</span>

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<pre style="margin: 0;"> <span id="LC117" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC118" class="line" lang="plaintext">Should you wish to see levity polymorphism in your types, enable</span>

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<br>

</li>

<li id="915e4cd0ff4c05278c1d4b529ae8997ea58835f0">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#915e4cd0ff4c05278c1d4b529ae8997ea58835f0"><strong>docs/users_guide/exts/typed_holes.rst</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="443" style="width: 35px; color: rgba(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="443" style="width: 35px; color: rgba(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">@@ -443,7 +443,7 @@ it will additionally offer up a list of refinement hole fits, in this case: ::</td>

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<pre style="margin: 0;"> <span id="LC443" class="line" lang="plaintext">      with const @Integer @[Integer]</span>

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<pre style="margin: 0;"> <span id="LC444" class="line" lang="plaintext">      where const :: forall a b. a -> b -> a</span>

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<pre style="margin: 0;"> <span id="LC445" class="line" lang="plaintext">    ($) (_ :: [Integer] -> Integer)</span>

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446

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<pre style="margin: 0;">-<span id="LC446" class="line" lang="plaintext">      with ($) @<span class="idiff left right">'</span>GHC.Types.LiftedRep @[Integer] @Integer</span>

</pre>

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446

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<pre style="margin: 0;">+<span id="LC446" class="line" lang="plaintext">      with ($) @GHC.Types.LiftedRep @[Integer] @Integer</span>

</pre>

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447

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447

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<pre style="margin: 0;"> <span id="LC447" class="line" lang="plaintext">      where ($) :: forall a b. (a -> b) -> a -> b</span>

</pre>

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

448

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448

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<pre style="margin: 0;"> <span id="LC448" class="line" lang="plaintext">    fail (_ :: String)</span>

</pre>

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449

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<td class="diff-line-num new_line" data-linenumber="449" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

449

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<pre style="margin: 0;"> <span id="LC449" class="line" lang="plaintext">      with fail @((->) [Integer]) @Integer</span>

</pre>

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<br>

</li>

<li id="3ebfc492d70160394bfaca1d5eb35f389fdce61d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#3ebfc492d70160394bfaca1d5eb35f389fdce61d"><strong>testsuite/tests/ghci/scripts/T13963.script</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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

1

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

1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext">:set -XPolyKinds -XDataKinds -XRankNTypes</span>

</pre>

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2

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">import GHC.Exts (TYPE, RuntimeRep<span class="idiff left right">(BoxedRep), Levity(Lifted)</span>)</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">import GHC.Exts (TYPE, RuntimeRep<span class="idiff left right">, LiftedRep</span>)</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<td class="diff-line-num new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<pre style="margin: 0;"> <span id="LC3" class="line" lang="plaintext">type Pair (a :: TYPE rep) (b :: TYPE rep') rep'' = forall (r :: TYPE rep''). (a -> b -> r)</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4

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<td class="diff-line-num new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4

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<pre style="margin: 0;"> <span id="LC4" class="line" lang="plaintext">:kind Pair</span>

</pre>

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5

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

5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext">:kind Pair Int</span>

</pre>

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6

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<td class="diff-line-num new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">:kind Pair Int Float</span>

</pre>

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7

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<td class="diff-line-num new_line old" data-linenumber="7" 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="LC7" class="line" lang="plaintext">:kind Pair Int Float <span class="idiff left right">('BoxedRep 'Lifted)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext">:kind Pair Int Float <span class="idiff left right">LiftedRep</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

8

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<td class="diff-line-num new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

8

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

<pre style="margin: 0;"> <span id="LC8" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

9

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<td class="diff-line-num new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

9

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="plaintext">:set -fprint-explicit-runtime-reps</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

10

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<td class="diff-line-num new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

10

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="plaintext">:kind Pair</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

11

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<td class="diff-line-num new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

11

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="plaintext">:kind Pair Int</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

12

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<td class="diff-line-num new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

12

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="plaintext">:kind Pair Int Float</span>

</pre>

</td>

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

13

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="plaintext">:kind Pair Int Float <span class="idiff left right">('BoxedRep 'Lifted)</span></span></pre>

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<td class="diff-line-num new old_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext">:kind Pair Int Float <span class="idiff left right">LiftedRep</span></span></pre>

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<br>

</li>

<li id="d42150135717c65d60817d669b5015c71ebbd77c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#d42150135717c65d60817d669b5015c71ebbd77c"><strong>testsuite/tests/ghci/scripts/T13963.stdout</strong></a>

<hr>

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

1

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

1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext">Pair :: * -> * -> RuntimeRep -> *</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2

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<td class="diff-line-num new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2

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<pre style="margin: 0;"> <span id="LC2" class="line" lang="plaintext">Pair Int :: * -> RuntimeRep -> *</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<td class="diff-line-num new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<pre style="margin: 0;"> <span id="LC3" class="line" lang="plaintext">Pair Int Float :: RuntimeRep -> *</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4" 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">

4

</td>

<td class="diff-line-num new_line old" data-linenumber="4" 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="LC4" class="line" lang="plaintext">Pair Int Float <span class="idiff left right">('BoxedRep 'Lifted)</span> :: *</span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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

<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">Pair Int Float <span class="idiff left right">LiftedRep</span> :: *</span>

</pre>

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

5

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

5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext">Pair :: TYPE rep -> TYPE rep' -> RuntimeRep -> *</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

6

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<td class="diff-line-num new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">Pair Int :: * -> RuntimeRep -> *</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<td class="diff-line-num new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<pre style="margin: 0;"> <span id="LC7" class="line" lang="plaintext">Pair Int Float :: RuntimeRep -> *</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="8" 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">

8

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<td class="diff-line-num new_line old" data-linenumber="8" 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="LC8" class="line" lang="plaintext">Pair Int Float <span class="idiff left right">('BoxedRep 'Lifted)</span> :: *</span></pre>

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<td class="diff-line-num new old_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext">Pair Int Float <span class="idiff left right">LiftedRep</span> :: *</span></pre>

</td>

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</table>

<br>

</li>

<li id="c47148a3e80c82f6d87408a9cd54b053aa8f830b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#c47148a3e80c82f6d87408a9cd54b053aa8f830b"><strong>testsuite/tests/typecheck/should_compile/LevPolyResult.hs</strong></a>

<hr>

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

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

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language DataKinds #-}</span></span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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

<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language KindSignatures #-}</span></span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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

<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language PolyKinds #-}</span></span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language RankNTypes #-}</span></span>

</pre>

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

</td>

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

5

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

<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"></span>

</pre>

</td>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">LevPolyResult</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">example</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span> </span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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

</pre>

</td>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

</pre>

</td>

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10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">example</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="p">(</span><span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Levity</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">'BoxedRep</span> <span class="n" style="color: #333;">v</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;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span></span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">example</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">f</span> <span class="mi" style="color: #099;">42</span></span></pre>

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<li id="34fe7bf0e6fbf60effb28393399ba68666593909">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#34fe7bf0e6fbf60effb28393399ba68666593909"><strong>testsuite/tests/typecheck/should_compile/all.T</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -688,6 +688,7 @@ test('UnliftedNewtypesForall', normal, compile, [''])</td>

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<pre style="margin: 0;"> <span id="LC688" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnlifNewUnify</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC689" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesLPFamily</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC690" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesDifficultUnification</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;">+<span id="LC691" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LevPolyResult</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC692" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16832</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">ghci_script</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T16832.script</span><span class="p">'])</span></span>

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<pre style="margin: 0;"> <span id="LC693" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16995</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC694" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17007</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<li id="ce2724903dd9d0c17f56742c7378d51383547982">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#ce2724903dd9d0c17f56742c7378d51383547982"><strong>testsuite/tests/typecheck/should_fail/LevPolyLet.hs</strong></a>

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

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language DataKinds #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language KindSignatures #-}</span></span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language PolyKinds #-}</span></span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language RankNTypes #-}</span></span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">LevPolyLet</span></span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell">  <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">example</span></span>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell">  <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This should be rejected because of the let binding.</span></span>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="n" style="color: #333;">example</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="p">(</span><span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Levity</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">'BoxedRep</span> <span class="n" style="color: #333;">v</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="LC14" class="line" lang="haskell">     <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="n" style="color: #333;">example</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">g</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">f</span> <span class="mi" style="color: #099;">42</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell">   <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">g</span> <span class="n" style="color: #333;">x</span></span></pre>

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<br>

</li>

<li id="88ce4e57d7b4597f1d2cca94da35daa43cae3d8b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#88ce4e57d7b4597f1d2cca94da35daa43cae3d8b"><strong>testsuite/tests/typecheck/should_fail/LevPolyLet.stderr</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">LevPolyLet.hs:18:7:</span>

</pre>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">    A levity-polymorphic type is not allowed here:</span>

</pre>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">      Type: a</span>

</pre>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">      Kind: TYPE ('BoxedRep v)</span>

</pre>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">    In the type of binder ‘x’</span></pre>

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</li>

<li id="b9e86d897a62509b0114d81d5e736630d6f68f43">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#b9e86d897a62509b0114d81d5e736630d6f68f43"><strong>testsuite/tests/typecheck/should_fail/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="440" style="width: 35px; color: rgba(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="440" style="width: 35px; color: rgba(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">@@ -440,6 +440,7 @@ test('T13068', [extra_files(['T13068.hs', 'T13068a.hs', 'T13068.hs-boot', 'T1306</td>

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440

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<pre style="margin: 0;"> <span id="LC440" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13075</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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441

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441

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<pre style="margin: 0;"> <span id="LC441" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13105</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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442

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442

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<pre style="margin: 0;"> <span id="LC442" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LevPolyBounded</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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</td>

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443

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<pre style="margin: 0;">+<span id="LC443" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LevPolyLet</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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443

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444

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<pre style="margin: 0;"> <span id="LC444" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13487</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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444

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445

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<pre style="margin: 0;"> <span id="LC445" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13292</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">multimod_compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T13292</span><span class="p">',</span> <span class="p">'</span><span class="s1" style="color: #d14;">-v0 -fdefer-type-errors</span><span class="p">'])</span></span>

</pre>

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445

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<td class="diff-line-num new_line" data-linenumber="446" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

446

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<pre style="margin: 0;"> <span id="LC446" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13300</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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</table>

<br>

</li>

<li id="09542c788b655f0aa4f986428f56a30a2832f6b2">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#09542c788b655f0aa4f986428f56a30a2832f6b2"><strong>testsuite/tests/typecheck/should_run/LevPolyResultInst.hs</strong></a>

<hr>

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

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language BangPatterns #-}</span></span>

</pre>

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

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language DataKinds #-}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language MagicHash #-}</span></span>

</pre>

</td>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language PolyKinds #-}</span></span>

</pre>

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

5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language RankNTypes #-}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# language UnboxedTuples #-}</span></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

</pre>

</td>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

</td>

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

<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

</td>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

11

</td>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell">  <span class="n" style="color: #333;">print</span> <span class="p">(</span><span class="n" style="color: #333;">example</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">></span> <span class="mi" style="color: #099;">7</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">indexArray</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">example</span> <span class="n" style="color: #333;">replicateFalse</span><span class="p">)</span> <span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">#</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell">    <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">print</span> <span class="n" style="color: #333;">r</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Combines base:runST, primitive:newArray, and primitive:unsafeFreezeArray</span></span>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="n" style="color: #333;">replicateFalse</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Array</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="n" style="color: #333;">replicateFalse</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span></span>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">let</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">runRW</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell">        <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">newArray</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">n</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell">          <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s'</span><span class="p">,</span> <span class="n" style="color: #333;">arr</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsafeFreezeArray</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">arr</span> <span class="n" style="color: #333;">s'</span></span>

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

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell">   <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">r</span></span>

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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"><span class="n" style="color: #333;">example</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="p">(</span><span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Levity</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">'BoxedRep</span> <span class="n" style="color: #333;">v</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;">Int</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span></span>

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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# noinline example #-}</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="n" style="color: #333;">example</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">f</span> <span class="mi" style="color: #099;">8</span><span class="o" style="font-weight: 600;">#</span></span></pre>

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</li>

<li id="4ebb79701c0fa02f610954161e711f341a3704b1">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#4ebb79701c0fa02f610954161e711f341a3704b1"><strong>testsuite/tests/typecheck/should_run/LevPolyResultInst.stdout</strong></a>

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

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">True</span>

</pre>

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

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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

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<br>

</li>

<li id="8db0e99055bd439c988ea726deb76570d8736a55">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/39caf4f1edde204edd323596ba2b2b2890dce093...0dace92a5867ced6f979b4543c49865165d4c49a#8db0e99055bd439c988ea726deb76570d8736a55"><strong>testsuite/tests/typecheck/should_run/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="145" style="width: 35px; color: rgba(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="145" style="width: 35px; color: rgba(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">@@ -145,5 +145,6 @@ test('UnliftedNewtypesFamilyRun', normal, compile_and_run, [''])</td>

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<td class="diff-line-num old_line" data-linenumber="145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

145

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<td class="diff-line-num new_line" data-linenumber="145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

145

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<pre style="margin: 0;"> <span id="LC145" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesDependentFamilyRun</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

146

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<td class="diff-line-num new_line" data-linenumber="146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

146

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<pre style="margin: 0;"> <span id="LC146" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesIdentityRun</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="147" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

147

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<td class="diff-line-num new_line" data-linenumber="147" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

147

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<pre style="margin: 0;"> <span id="LC147" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesCoerceRun</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="148" style="width: 35px; color: rgba(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="148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

148

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<pre style="margin: 0;">+<span id="LC148" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LevPolyResultInst</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

148

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

149

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<pre style="margin: 0;"> <span id="LC149" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17104</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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

149

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<td class="diff-line-num new_line" data-linenumber="150" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

150

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<pre style="margin: 0;"> <span id="LC150" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18627</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O</span><span class="p">'])</span>  <span class="c1" style="color: #998; font-style: italic;"># Optimisation shows up the bug</span></span></pre>

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