#14273: Typed holes' "valid substitutions" suggestions are oblivious to type class constraints -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.3 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: #9091 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * cc: Tritlo (added) * related: => #9091 Comment: Ah, I was not aware of that ticket! Thanks, kosmikus. As noted in the original comment, there are really two bugs here: 1. The lack of reporting about type class constraints in typed hole error messages. This, as it turns out, is essentially a duplicate of #9091. 2. The incorrect "valid substitution" suggestions. I move to make this ticket about that portion specifically. To this end, I've cc'd Tritlo, the author of these valid substitution suggestions. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14273#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler