#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: ---------------------------------------+---------------------------------- Comment (by Joachim Breitner <mail@…>): In [changeset:"312686c172eefb74237c8a61e2cca1b2af7459c1/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="312686c172eefb74237c8a61e2cca1b2af7459c1" In deepSplitCprType_maybe, be more forgiving the ConTag may be out of range (e.g. if the type constructor is imported via SOURCE and we don't know any of its data constructors); just return Nothing without complaining in that case. This fixes #8743. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8743#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler