Re: [GHC] #14939: Lint error in forall type

#14939: Lint error in forall type -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.5 Resolution: | Keywords: | StaticPointers Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones ): In [changeset:"9d600ea68c283b0d38ac663c3cc48baba6b94f57/ghc" 9d600ea6/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="9d600ea68c283b0d38ac663c3cc48baba6b94f57" Expand type synonyms when Linting a forall Trac #14939 showed a type like type Alg cls ob = ob f :: forall (cls :: * -> Constraint) (b :: Alg cls *). b where the kind of the forall looks like (Alg cls *), with a free cls. This tripped up Core Lint. I fixed this by making Core Lint a bit more forgiving, expanding type synonyms if necessary. I'm worried that this might not be the whole story; notably typeKind looks suspect. But it certainly fixes this problem. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14939#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler