#7965: The 'impossible' happened! ---------------------------------+------------------------------------------ Reporter: adit | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.4.1 Resolution: duplicate | Keywords: Os: MacOS X | Architecture: x86_64 (amd64) Failure: Compile-time crash | Difficulty: Unknown Testcase: | Blockedby: Blocking: | Related: ---------------------------------+------------------------------------------ Comment(by Fuuzetsu): Ironically, I had the impossible happen when installing the dependencies for the OP's project with GHC 7.7.20130531. {{{ [1 of 1] Compiling Data.Digest.Pure.SHA ( Data/Digest/Pure/SHA.hs, dist/build/Data/Digest/Pure/SHA.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.7.20130531 for i386-unknown-linux): regSpill: out of spill slots! regs to spill = 1099 slots left = 677 }}} Do you want a separate bug report? -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7965#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler