#7862: Could not deduce (A) from the context (A, ...) ----------------------------------------+----------------------------------- Reporter: alang9 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type checker) | Version: 7.6.2 Keywords: | Os: Linux Architecture: x86_64 (amd64) | Failure: GHC rejects valid program Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ----------------------------------------+----------------------------------- Comment(by simonpj): {{{ commit db07129cfb13a856f31276c76e9e00924835b18e Author: Simon Peyton Jones <simonpj@microsoft.com> Date: Thu May 2 17:14:23 2013 +0100 Eliminate (given) flatten-skolems in favour of user type variables See Note [Eliminate flat-skols]. IT wasn't exactly wrong before the the error messages are deeply strange. }}} -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7862#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler