#12187: Clarify the scoping of existentials for pattern synonym signatures -------------------------------------+------------------------------------- Reporter: mpickering | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: | PatternSynonyms Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #12108 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): There should be no existentials in the return type. So that type signature would be rejected with that message. I'll edit comment:3 to clarify that Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12187#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler