#11550: ghc-HEAD -DDEBUG is broken (possiby by D1880) -------------------------------------+------------------------------------- Reporter: slyfox | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | crash Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Was found when tried to build with BuildFlavour = devel2 {{{ ghc-validate $ LANG=C make V=0 HC [stage 2] libraries/parallel/dist-install/build/Control/Seq.o WARNING: file compiler/stgSyn/CoreToStg.hs, line 250 using False True ghc-stage2: panic! (the 'impossible' happened) (GHC version 8.1.20160206 for x86_64-unknown-linux): ASSERT failed! CallStack (from HasCallStack): assertPprPanic, called at compiler/stgSyn/CoreToStg.hs:216:59 in ghc:CoreToStg using Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} https://travis-ci.org/ghc/ghc/builds suggests changeset:4f9967aa3d1f7cfd539d0c173cafac0fe290e26f might be at fault. Reverting it on top of master fixes devel2 build. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11550 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler