#15869: Discrepancy between seemingly equivalent type synonym and type family -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.6.2 checker) | Keywords: TypeFamilies, Resolution: | TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): If you don't have impredicative-types, then surely the example in the second bullet of comment:5 should be rejected! But still, the error message looks deeply strange. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15869#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler