#10782: Existential variables not scoped? -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler (Type | Version: 7.11 checker) | Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by goldfire): * status: new => closed * resolution: => invalid Comment: Ah. After quite a bit more staring at the situation, I now understand. Existential variables are ''not'' added to `tcl_tyvars` directly. But all free variables of anything that is in scope (term-level or type-level) ''are'' added there. Because you can't ever get to a type variable unless it is in scope or something that mentions it is in scope, this is all OK. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10782#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler