#7965: The 'impossible' happened! -------------------------------+-------------------------------------------- Reporter: adit | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.4.1 | Keywords: Os: MacOS X | Architecture: x86_64 (amd64) Failure: Compile-time crash | Blockedby: Blocking: | Related: -------------------------------+-------------------------------------------- Comment(by adit): Ok, I was able to narrow it down to two lines: data Color = Red | Blue deriving (show) main = print Red see that `deriving (show)` with `show` lowercase? That's what's causing the bug. I haven't tried this with 7.6, so apologies if it was already fixed. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7965#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler