Re: [GHC] #14237: -Wredundant-constraints incorrectly treats all type equality constraints as redundant

#14237: -Wredundant-constraints incorrectly treats all type equality constraints as redundant -------------------------------------+------------------------------------- Reporter: lexi.lambda | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: #12700 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones ): In [changeset:"1db0f4a48e9db5e85782e32f074cc83bbc145cb7/ghc" 1db0f4a/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="1db0f4a48e9db5e85782e32f074cc83bbc145cb7" Fix unused-given-constraint bug This bug was shown up by Trac #14237. It turned out to be an outright error in TcSimplify.neededEvVars, easily fixed. I improved the comments. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14237#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler