#13415: Instance declarations don't recognize named wildcards -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.4.1 Component: Compiler (Type | Version: 8.0.1 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: #13324 | Differential Rev(s): Phab:D3332 Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I still don't know what you are trying to achieve. The error message looks spot on to me, and is the same whether you write `x`, `x_`, `_x` or `xx`, just as it is in any other type that does not admit wildcards. What error message do you actually want? What about the other uses of `LHsSigType`? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13415#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler