#8743: The impossible happened : Prelude.(!!): index too large ---------------------------------------+---------------------------------- Reporter: erikd | Owner: nomeata Type: bug | Status: new Priority: highest | Milestone: 7.8.1 Component: Compiler | Version: 7.8.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 (amd64) Type of failure: Compile-time crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: ---------------------------------------+---------------------------------- Changes (by nomeata): * owner: => nomeata Comment: Thanks for the debugging, that is very helpful. It is likely a problem caused by the demand analyser ignoring coercions, so sometimes the type do not match up; in that the solution will be to just make the code more forgiving. Will look into it later today. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8743#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler