#12158: ghc: panic! (the 'impossible' happened) translateConPatVec: lookup -------------------------------------+------------------------------------- Reporter: wozgonon | Owner: gkaracha Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: | PatternMatchWarnings Operating System: Windows | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Aha. Quite right. In general GHCi lets you over-ride an old definition for `f` with a new one. But here it doesn't make sense to override a record selector with a function. Someone should think this through. It's a bit fiddly, but I don't think it's really hard. Eg. in GHCi don't allow a let-binding override a record selector. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12158#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler