#11438: Code does not compile without ScopedTypeVariables -------------------------------------+------------------------------------- Reporter: wereHamster | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: 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 bgamari): We should also mention in the users guide the fact that type variables in an instance head are brought into scope. [[http://downloads.haskell.org/~ghc/master/users- guide//glasgow_exts.html?highlight=scoped%20type%20variables#ghc-flag-- XScopedTypeVariables|Currently]] the text suggests that only variables introduced with an explicit `forall` are brought into scope. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11438#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler