#12801: Misleading error message when deriving Functor -------------------------------------+------------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.0.1 Resolution: | Keywords: 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 RyanGlScott): I think this is a duplicate of #10684, as the failure to derive `Functor` for `Wibble` prevents `Eq` and `Show` from being derived for `Wibble`, causing a cascade of error messages for `Container`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12801#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler