#10722: GHC accepts "instance forall b. Blah []" -------------------------------------+------------------------------------- Reporter: osa1 | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.11 Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC accepts | Unknown/Multiple invalid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"d7ced09a0a8d9e0f3c6631e2814078145036c90a/ghc" d7ced09a/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="d7ced09a0a8d9e0f3c6631e2814078145036c90a" Minor improvement to user guide Specify that the type variables for a class/instance decl scope over the body even without a 'forall'. Provoked by Trac #10722. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10722#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler