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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cd8409c26d4370bf2cdcd76801974e99a9adf7b0">cd8409c2</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-04-23T11:39:24-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Create di_scoped_tvs for associated data family instances properly
See `Note [Associated data family instances and di_scoped_tvs]` in
`GHC.Tc.TyCl.Instance`, which explains all of the moving parts.
Fixes #18055.
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<h4>3 changed files:</h4>
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<li class="file-stats">
<a href="#e63425e031ffe9350ee6b1687e506aaea75d11e1">
compiler/GHC/Tc/TyCl/Instance.hs
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<a href="#36a6579ad6acf1e0db82a8dae6edcb33d8717111">
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+
testsuite/tests/deriving/should_compile/T18055.hs
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</li>
<li class="file-stats">
<a href="#e7bc29da08da2be1b3bd264c751322dc3e8c1905">
testsuite/tests/deriving/should_compile/all.T
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<h4>Changes:</h4>
<li id="e63425e031ffe9350ee6b1687e506aaea75d11e1">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cd8409c26d4370bf2cdcd76801974e99a9adf7b0#e63425e031ffe9350ee6b1687e506aaea75d11e1"><strong>compiler/GHC/Tc/TyCl/Instance.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -77,6 +77,7 @@ import BooleanFormula ( isUnsatisfied, pprBooleanFormulaNice )</td>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">GHC.LanguageExtensions</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">LangExt</span></span>
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78
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78
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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell"></span>
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79
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79
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span></span>
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80
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<pre style="margin: 0;">+<span id="LC80" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Tuple</span></span>
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81
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<pre style="margin: 0;"> <span id="LC81" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span></span>
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82
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<pre style="margin: 0;"> <span id="LC82" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span><span class="p">(</span> <span class="n" style="color: #333;">mapAccumL</span> <span class="p">)</span></span>
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83
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<pre style="margin: 0;"> <span id="LC83" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="460" style="width: 35px; color: rgba(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="461" style="width: 35px; color: rgba(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">@@ -460,7 +461,7 @@ tcLocalInstDecl (L loc (TyFamInstD { tfid_inst = decl }))</td>
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460
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461
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<pre style="margin: 0;"> <span id="LC461" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">fam_inst</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="p">}</span></span>
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461
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462
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<pre style="margin: 0;"> <span id="LC462" class="line" lang="haskell"></span>
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462
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463
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<pre style="margin: 0;"> <span id="LC463" class="line" lang="haskell"><span class="n" style="color: #333;">tcLocalInstDecl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataFamInstD</span> <span class="p">{</span> <span class="n" style="color: #333;">dfid_inst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">decl</span> <span class="p">}))</span></span>
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463
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<pre style="margin: 0;">-<span id="LC463" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">fam_inst</span><span class="p">,</span> <span class="n" style="color: #333;">m_deriv_info</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="kt" style="color: #458; font-weight: 600;">NotAssociated</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">decl</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC464" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">fam_inst</span><span class="p">,</span> <span class="n" style="color: #333;">m_deriv_info</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="kt" style="color: #458; font-weight: 600;">NotAssociated</span> <span class="n" style="color: #333;"><span class="idiff left">emptyVarEnv</span></span><span class="idiff right"> </span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">decl</span><span class="p">)</span></span>
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464
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<pre style="margin: 0;"> <span id="LC465" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">fam_inst</span><span class="p">],</span> <span class="n" style="color: #333;">maybeToList</span> <span class="n" style="color: #333;">m_deriv_info</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC466" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC467" class="line" lang="haskell"><span class="n" style="color: #333;">tcLocalInstDecl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ClsInstD</span> <span class="p">{</span> <span class="n" style="color: #333;">cid_inst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">decl</span> <span class="p">}))</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="483" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="484" style="width: 35px; color: rgba(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">@@ -483,6 +484,9 @@ tcClsInstDecl (L loc (ClsInstDecl { cid_poly_ty = hs_ty, cid_binds = binds</td>
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483
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<pre style="margin: 0;"> <span id="LC484" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="n" style="color: #333;">skol_tvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstSkolTyVars</span> <span class="n" style="color: #333;">tyvars</span></span>
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<pre style="margin: 0;"> <span id="LC485" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">tv_skol_prs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span> <span class="p">(</span><span class="n" style="color: #333;">tyVarName</span> <span class="n" style="color: #333;">tv</span><span class="p">,</span> <span class="n" style="color: #333;">skol_tv</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC486" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">tv</span><span class="p">,</span> <span class="n" style="color: #333;">skol_tv</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tyvars</span> <span class="p">`</span><span class="n" style="color: #333;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">skol_tvs</span> <span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC487" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Map from the skolemized Names to the original Names.</span></span>
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<pre style="margin: 0;">+<span id="LC488" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Associated data family instances and di_scoped_tvs].</span></span>
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489
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<pre style="margin: 0;">+<span id="LC489" class="line" lang="haskell"> <span class="n" style="color: #333;">tv_skol_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarEnv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">swap</span> <span class="n" style="color: #333;">tv_skol_prs</span></span>
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490
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<pre style="margin: 0;"> <span id="LC490" class="line" lang="haskell"> <span class="n" style="color: #333;">n_inferred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">countWhile</span> <span class="p">((</span><span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">Inferred</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">binderArgFlag</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;"> <span id="LC491" class="line" lang="haskell"> <span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">splitForAllVarBndrs</span> <span class="n" style="color: #333;">dfun_ty</span></span>
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<pre style="margin: 0;"> <span id="LC492" class="line" lang="haskell"> <span class="n" style="color: #333;">visible_skol_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">drop</span> <span class="n" style="color: #333;">n_inferred</span> <span class="n" style="color: #333;">skol_tvs</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -497,7 +501,7 @@ tcClsInstDecl (L loc (ClsInstDecl { cid_poly_ty = hs_ty, cid_binds = binds</td>
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<pre style="margin: 0;"> <span id="LC501" class="line" lang="haskell"> <span class="n" style="color: #333;">mb_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">InClsInst</span> <span class="p">{</span> <span class="n" style="color: #333;">ai_class</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">clas</span></span>
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<pre style="margin: 0;"> <span id="LC502" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ai_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">visible_skol_tvs</span></span>
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<pre style="margin: 0;"> <span id="LC503" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ai_inst_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mini_env</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC500" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">df_stuff</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapAndRecoverM</span> <span class="p">(</span><span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="n" style="color: #333;">mb_info</span><span class="p">)</span> <span class="n" style="color: #333;">adts</span></span>
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<pre style="margin: 0;">+<span id="LC504" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">df_stuff</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapAndRecoverM</span> <span class="p">(</span><span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="n" style="color: #333;">mb_info</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">tv_skol_env</span></span><span class="p">)</span> <span class="n" style="color: #333;">adts</span></span>
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<pre style="margin: 0;"> <span id="LC505" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tf_insts1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapAndRecoverM</span> <span class="p">(</span><span class="n" style="color: #333;">tcTyFamInstDecl</span> <span class="n" style="color: #333;">mb_info</span><span class="p">)</span> <span class="n" style="color: #333;">ats</span></span>
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC507" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Check for missing associated types and build them</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -634,10 +638,16 @@ For some reason data family instances are a lot more complicated</td>
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<pre style="margin: 0;"> <span id="LC638" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">than type family instances</span></span>
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<pre style="margin: 0;"> <span id="LC639" 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="LC640" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC637" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">AssocInstInfo</span></span>
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<pre style="margin: 0;">-<span id="LC638" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LDataFamInstDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FamInst</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">DerivInfo</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC641" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="o" style="font-weight: 600;">::</span></span>
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<pre style="margin: 0;">+<span id="LC642" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">AssocInstInfo</span></span>
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<pre style="margin: 0;">+<span id="LC643" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyVarEnv</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="c1" style="color: #998; font-style: italic;">-- If this is an associated data family instance, maps the</span></span>
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<pre style="margin: 0;">+<span id="LC644" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- parent class's skolemized type variables to their</span></span>
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<pre style="margin: 0;">+<span id="LC645" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- original Names. If this is a non-associated instance,</span></span>
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<pre style="margin: 0;">+<span id="LC646" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- this will be empty.</span></span>
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<pre style="margin: 0;">+<span id="LC647" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Associated data family instances and di_scoped_tvs].</span></span>
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<pre style="margin: 0;">+<span id="LC648" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LDataFamInstDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FamInst</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">DerivInfo</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC649" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- "newtype instance" and "data instance"</span></span>
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<pre style="margin: 0;">-<span id="LC640" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="n" style="color: #333;">mb_clsinfo</span></span>
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<pre style="margin: 0;">+<span id="LC650" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstDecl</span> <span class="n" style="color: #333;">mb_clsinfo</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">tv_skol_env</span></span></span>
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<pre style="margin: 0;"> <span id="LC651" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">decl</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataFamInstDecl</span> <span class="p">{</span> <span class="n" style="color: #333;">dfid_eqn</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HsIB</span> <span class="p">{</span> <span class="n" style="color: #333;">hsib_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">imp_vars</span></span>
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<pre style="margin: 0;"> <span id="LC652" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hsib_body</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC653" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">FamEqn</span> <span class="p">{</span> <span class="n" style="color: #333;">feqn_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mb_bndrs</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -749,11 +759,12 @@ tcDataFamInstDecl mb_clsinfo</td>
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<pre style="margin: 0;"> <span id="LC759" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">checkValidCoAxBranch</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">ax_branch</span></span>
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<pre style="margin: 0;"> <span id="LC760" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">checkValidTyCon</span> <span class="n" style="color: #333;">rep_tc</span></span>
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761
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<pre style="margin: 0;"> <span id="LC761" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC752" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">m_deriv_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">derivs</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">scoped_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">mk_deriv_info_scoped_tv_pr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">rep_tc</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell"> <span class="n" style="color: #333;">m_deriv_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">derivs</span> <span class="kr" style="font-weight: 600;">of</span></span>
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764
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<pre style="margin: 0;"> <span id="LC764" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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754
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765
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<pre style="margin: 0;"> <span id="LC765" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">preds</span> <span class="o" style="font-weight: 600;">-></span></span>
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755
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766
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<pre style="margin: 0;"> <span id="LC766" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">DerivInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">di_rep_tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rep_tc</span></span>
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756
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<pre style="margin: 0;">-<span id="LC756" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_scoped_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">mkTyVarNamePairs</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">tyConTyVars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rep_tc</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_scoped_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">scoped_tvs</span></span></span>
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768
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<pre style="margin: 0;"> <span id="LC768" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_clauses</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">preds</span></span>
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758
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769
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<pre style="margin: 0;"> <span id="LC769" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcMkDataFamInstCtxt</span> <span class="n" style="color: #333;">decl</span> <span class="p">}</span></span>
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759
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770
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<pre style="margin: 0;"> <span id="LC770" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="784" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -784,6 +795,45 @@ tcDataFamInstDecl mb_clsinfo</td>
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<pre style="margin: 0;"> <span id="LC795" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">pats</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bndr</span> <span class="n" style="color: #333;">tv</span> <span class="n" style="color: #333;">tcb_vis</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">etad_tvs</span><span class="p">)</span></span>
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785
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796
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<pre style="margin: 0;"> <span id="LC796" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">pats</span> <span class="n" style="color: #333;">etad_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fstOf3</span> <span class="n" style="color: #333;">pats</span><span class="p">),</span> <span class="n" style="color: #333;">etad_tvs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC797" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC798" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Create a Name-TyVar mapping to bring into scope when typechecking any</span></span>
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<pre style="margin: 0;">+<span id="LC799" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- deriving clauses this data family instance may have.</span></span>
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<pre style="margin: 0;">+<span id="LC800" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Associated data family instances and di_scoped_tvs].</span></span>
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<pre style="margin: 0;">+<span id="LC801" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_deriv_info_scoped_tv_pr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC802" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_deriv_info_scoped_tv_pr</span> <span class="n" style="color: #333;">tv</span> <span class="o" style="font-weight: 600;">=</span></span>
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803
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<pre style="margin: 0;">+<span id="LC803" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupWithDefaultVarEnv</span> <span class="n" style="color: #333;">tv_skol_env</span> <span class="p">(</span><span class="n" style="color: #333;">tyVarName</span> <span class="n" style="color: #333;">tv</span><span class="p">)</span> <span class="n" style="color: #333;">tv</span></span>
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804
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<pre style="margin: 0;">+<span id="LC804" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">,</span> <span class="n" style="color: #333;">tv</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC805" class="line" lang="haskell"></span>
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806
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<pre style="margin: 0;">+<span id="LC806" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;">+<span id="LC807" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Associated data family instances and di_scoped_tvs]</span></span>
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808
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<pre style="margin: 0;">+<span id="LC808" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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809
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<pre style="margin: 0;">+<span id="LC809" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Some care is required to implement `deriving` correctly for associated data</span></span>
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810
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<pre style="margin: 0;">+<span id="LC810" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">family instances. Consider this example from #18055:</span></span>
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811
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<pre style="margin: 0;">+<span id="LC811" class="line" lang="haskell"></span>
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812
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<pre style="margin: 0;">+<span id="LC812" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> class C a where</span></span>
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813
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<pre style="margin: 0;">+<span id="LC813" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> data D a</span></span>
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<pre style="margin: 0;">+<span id="LC814" class="line" lang="haskell"></span>
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815
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<pre style="margin: 0;">+<span id="LC815" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> class X a b</span></span>
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816
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<pre style="margin: 0;">+<span id="LC816" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC817" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> instance C (Maybe a) where</span></span>
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<pre style="margin: 0;">+<span id="LC818" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> data D (Maybe a) deriving (X a)</span></span>
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819
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<pre style="margin: 0;">+<span id="LC819" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC820" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When typechecking the `X a` in `deriving (X a)`, we must ensure that the `a`</span></span>
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821
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<pre style="margin: 0;">+<span id="LC821" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">from the instance header is brought into scope. This is the role of</span></span>
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822
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<pre style="margin: 0;">+<span id="LC822" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">di_scoped_tvs, which maps from the original, renamed `a` to the skolemized,</span></span>
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823
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<pre style="margin: 0;">+<span id="LC823" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">typechecked `a`. When typechecking the `deriving` clause, this mapping will be</span></span>
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824
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<pre style="margin: 0;">+<span id="LC824" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">consulted when looking up the `a` in `X a`.</span></span>
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825
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<pre style="margin: 0;">+<span id="LC825" class="line" lang="haskell"></span>
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826
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<pre style="margin: 0;">+<span id="LC826" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">A naïve attempt at creating the di_scoped_tvs is to simply reuse the</span></span>
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827
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<pre style="margin: 0;">+<span id="LC827" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tyConTyVars of the representation TyCon for `data D (Maybe a)`. This is only</span></span>
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828
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<pre style="margin: 0;">+<span id="LC828" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">half correct, however. We do want the typechecked `a`'s Name in the /range/</span></span>
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829
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<pre style="margin: 0;">+<span id="LC829" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of the mapping, but we do not want it in the /domain/ of the mapping.</span></span>
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830
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<pre style="margin: 0;">+<span id="LC830" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">To ensure that the original `a`'s Name ends up in the domain, we consult a</span></span>
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831
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<pre style="margin: 0;">+<span id="LC831" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">TyVarEnv (passed as an argument to tcDataFamInstDecl) that maps from the</span></span>
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832
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<pre style="margin: 0;">+<span id="LC832" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">typechecked `a`'s Name to the original `a`'s Name. In the even that</span></span>
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833
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<pre style="margin: 0;">+<span id="LC833" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tcDataFamInstDecl is processing a non-associated data family instance, this</span></span>
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834
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<pre style="margin: 0;">+<span id="LC834" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">TyVarEnv will simply be empty, and there is nothing to worry about.</span></span>
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835
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<pre style="margin: 0;">+<span id="LC835" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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836
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<pre style="margin: 0;">+<span id="LC836" class="line" lang="haskell"></span>
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787
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837
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<pre style="margin: 0;"> <span id="LC837" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------</span></span>
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788
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838
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<pre style="margin: 0;"> <span id="LC838" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstHeader</span></span>
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789
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839
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<pre style="margin: 0;"> <span id="LC839" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">AssocInstInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LHsTyVarBndr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cd8409c26d4370bf2cdcd76801974e99a9adf7b0#36a6579ad6acf1e0db82a8dae6edcb33d8717111"><strong>testsuite/tests/deriving/should_compile/T18055.hs</strong></a>
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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 DeriveAnyClass #-}</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 DerivingVia #-}</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 MultiParamTypeClasses #-}</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 TypeFamilies #-}</span></span>
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5
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Bug</span> <span class="kr" style="font-weight: 600;">where</span></span>
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6
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>
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7
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Kind</span></span>
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8
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>
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9
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----</span></span>
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10
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Block</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Block</span></span>
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12
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">NoThunks</span> <span class="n" style="color: #333;">m</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">AllowThunk</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;">AllowThunk</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">GetHeader</span> <span class="n" style="color: #333;">blk</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">Header</span> <span class="n" style="color: #333;">blk</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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19
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">GetHeader</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Block</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">Header</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Block</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">BlockHeader</span> <span class="p">{</span> <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;">Header</span> <span class="n" style="color: #333;">m</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">NoThunks</span> <span class="n" style="color: #333;">via</span> <span class="kt" style="color: #458; font-weight: 600;">AllowThunk</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Header</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Block</span> <span class="n" style="color: #333;">m</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">a</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">X</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">X</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDList</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">MyList</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;">MkMyList</span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MyList</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MyList</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDMyList</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">X</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="n" style="color: #333;">via</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cd8409c26d4370bf2cdcd76801974e99a9adf7b0#e7bc29da08da2be1b3bd264c751322dc3e8c1905"><strong>testsuite/tests/deriving/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">@@ -123,3 +123,4 @@ test('T17324', normal, compile, [''])</td>
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17339</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>
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<pre style="margin: 0;"> <span id="LC124" class="line" lang="perl"> <span class="p">['</span><span class="s1" style="color: #d14;">-ddump-simpl -dsuppress-idinfo -dno-typeable-binds</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC125" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17880</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="LC126" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18055</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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