#11582: Redundant constraints warning complains that (a ~ b) is redundant -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.0.1-rc2 checker) | Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * status: new => closed * resolution: => invalid Comment: I don't agree. "Redundant" means that if you leave it off the function will still compile. And indeed {{{ asTypeOf1 :: a -> b -> a asTypeOf1 x _ = x }}} is just fine. So I don't know what you mean by saying "the type checker has gleaned something from it". I say it's behaving precisely as advertised, so I'll close as invalid. Re- open if I have misunderstood. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11582#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler