#7458: ghc panic -------------------------+-------------------------------------------------- Reporter: timsears | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Compiler | Version: 7.4.1 Keywords: | Os: Linux Architecture: x86 | Failure: Compile-time crash Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | -------------------------+-------------------------------------------------- Description changed by igloo: Old description:

As ghc requested I am reporting this... All I can say right now is that I am tracking down a bug involving overlapping instances.

ghc: panic! (the 'impossible' happened) (GHC version 7.4.1 for i386-unknown-linu tcTyVarDetails ( t{tv acw0} [tv] :: ghc-prim:GHC.Prim.*{(w) tc 34d} )

Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug

New description: As ghc requested I am reporting this... All I can say right now is that I am tracking down a bug involving overlapping instances. {{{ ghc: panic! (the 'impossible' happened) (GHC version 7.4.1 for i386-unknown-linu tcTyVarDetails ( t{tv acw0} [tv] :: ghc-prim:GHC.Prim.*{(w) tc 34d} ) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7458#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler