#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: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): I suppose we wouldn't have to break anything for now if we went with another option: create a separate copy `hsScopedTvs` intended only for use with pattern synonyms and only apply the fix to that copy for now. That way, `g` would still continue to compile, as it would use the old codepath. Of course, we wouldn't want to maintain this `hsScopedTvs` split forever, but we can merge them back together when #14288 is implemented (where we have the liberty of changing the semantics of existing programs). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14498#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler