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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">OK I have verified that<o:p></o:p></span></p>
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<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span style="font-family:"Calibri",sans-serif">This split_marker crash happens on a clean HEAD build<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span style="font-family:"Calibri",sans-serif">Reverting “NCG: New code layout algorithm.”, 575515b4909f3d77b3d31f2f6c22d14a92d8b8e0, solves the problem.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Andreas: I propose to revert in HEAD unless you have a rapid fix, or believe that is somehow my fault.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">(Or maybe someone else can revert.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Simon Peyton Jones
<br>
<b>Sent:</b> 19 November 2018 14:53<br>
<b>To:</b> 'ghc-devs@haskell.org' <ghc-devs@haskell.org><br>
<b>Subject:</b> split_marker crash<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Urrgh. I have this panic in a clean validate (sh validate –fast) on my branch wip/T15809.<o:p></o:p></span></p>
<p class="Code">ghc-stage1: panic! (the 'impossible' happened)<o:p></o:p></p>
<p class="Code"> (GHC version 8.7.20181119 for x86_64-unknown-linux):<o:p></o:p></p>
<p class="Code"> split_marker_entry<o:p></o:p></p>
<p class="Code"><o:p> </o:p></p>
<p class="Code">Please report this as a GHC bug: <a href="http://www.haskell.org/ghc/reportabug">
http://www.haskell.org/ghc/reportabug</a><o:p></o:p></p>
<p class="Code"><o:p> </o:p></p>
<p class="Code">libraries/ghc-prim/ghc.mk:4: recipe for target 'libraries/ghc-prim/dist-install/build/GHC/Types.o' failed<o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Yes, it’s a branch not identical to HEAD, but I have done nothing concerning split_markers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Sigh. What should I do?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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