#14319: Stuck type families can lead to lousy error messages -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Compiler (Type | Version: 8.3 checker) | Keywords: TypeInType, Resolution: | TypeFamilies Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): How hard would it be to report an arity error only when we know the arity is wrong? And how often do we not know for sure? I don't want erosion of the common case either, but I don't see why it would be likely here. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14319#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler