#16033: Rank-n typechecking regression between GHC 8.4 and 8.6 -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.6.3 checker) | Resolution: | Keywords: RankNTypes Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * cc: goldfire (added) Comment: Commit faec8d358985e5d0bf363bd96f23fe76c9e281f7 (`Track type variable scope more carefully.`) is the culprit. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16033#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler