#9404: tcInferRho muddies the waters -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by simonpj): Re the last question, here's the comment in HEAD {{{ -- Make sure that the argument type has kind '*' -- Eg we do not want to allow (D# $ 4.0#) Trac #5570 -- (which gives a seg fault) -- We do this by unifying with a MetaTv; but of course -- it must allow foralls in the type it unifies with (hence PolyTv)! -- -- The result type can have any kind (Trac #8739), -- so we can just use res_ty -- ($) :: forall (a:*) (b:Open). (a->b) -> a -> b ; a_ty <- newPolyFlexibTyVarTy }}} Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9404#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler