#14498: GHC internal error: "not in scope during TC but it passed the renamer" -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.2.1 checker) | Keywords: Resolution: | PatternSynonyms Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: #14288 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * keywords: => PatternSynonyms * failure: None/Unknown => Compile-time crash or panic * component: Compiler => Compiler (Type checker) * related: => #14288 Comment: Yes, `kk` should definitely scope over the pattern synonym body. In fact, the only reason that it doesn't currently is due to #14288 (that is, `ScopedTypeVariables` doesn't pick up variables from nested `forall`s). I suspect fixing #14288 would quite naturally lead to a solution to this bug as well. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14498#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler