#11172: Turning on optimisations produces SEGFAULT or Impossible case alternative -------------------------------------+------------------------------------- Reporter: nh2 | Owner: bgamari Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Alright, I am able to reproduce this on `master`, {{{ $ git clone git://github.com/bgamari/impossible-case-alternative-repro repro $ cd repro $ git checkout segfault $ git clone git://github.com/bos/aeson $ cabal install aeson $ ghc -O Main.hs $ ./Main "before eval" Segmentation fault $ }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11172#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler