OK I have verified that * This split_marker crash happens on a clean HEAD build * Reverting "NCG: New code layout algorithm.", 575515b4909f3d77b3d31f2f6c22d14a92d8b8e0, solves the problem. Andreas: I propose to revert in HEAD unless you have a rapid fix, or believe that is somehow my fault. (Or maybe someone else can revert.) Simon
From: Simon Peyton Jones Sent: 19 November 2018 14:53 To: 'ghc-devs@haskell.org' <ghc-devs@haskell.org> Subject: split_marker crash Urrgh. I have this panic in a clean validate (sh validate -fast) on my branch wip/T15809. ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.7.20181119 for x86_64-unknown-linux): split_marker_entry Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug libraries/ghc-prim/ghc.mk:4: recipe for target 'libraries/ghc-prim/dist-install/build/GHC/Types.o' failed Yes, it's a branch not identical to HEAD, but I have done nothing concerning split_markers. Sigh. What should I do? Simon
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