#12148: GHC 8 crash when building "chatter" library --------------------------------------+--------------------------------- Reporter: varosi | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Windows Architecture: x86_64 (amd64) | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------------+--------------------------------- While I try to build "chatter" library from GitHub with Stack with GHC 8.0 resolver I got that crash: [ 9 of 23] Compiling NLP.Corpora.Brown ( src\NLP\Corpora\Brown.hs, .stack- work\dist\b7fec021\build\NLP\Corpora\Brown.o ) ghc.exe: panic! (the 'impossible' happened) (GHC version 8.0.1 for x86_64-unknown-mingw32): Simplifier ticks exhausted When trying RuleFired Class op unsafeShiftR To increase the limit, use -fsimpl-tick-factor=N (default 100) If you need to do this, let GHC HQ know, and what factor you needed To see detailed counts use -ddump-simpl-stats Total ticks: 11403800 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12148 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler