#11172: Turning on optimisations produces SEGFAULT or Impossible case alternative -------------------------------------+------------------------------------- Reporter: nh2 | Owner: Type: bug | Status: new Priority: normal | 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 nh2): Replying to [comment:12 bgamari]:
Hmm, I'm afraid I'm having some trouble reproducing this on 7.10.2, {{{ Module.hs:34:1: Warning: The import of ‘Control.Applicative’ is redundant }}}
@bgamari: I think you are on the `master` branch - for reproducing the segfault you need to go on the `segfault` branch of my repo, and on that one the `Control.Applicative` import is on a different line than in your warning: https://github.com/fpco/impossible-case-alternative- repro/blob/segfault/Module.hs#L44 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11172#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler