#9981: Potential typechecker regression in GHC 7.10.1RC -------------------------------------+------------------------------------- Reporter: hvr | Owner: simonpj Type: bug | Status: new Priority: highest | Milestone: 7.10.1 Component: Compiler (Type | Version: 7.10.1-rc1 checker) | Keywords: Resolution: | Architecture: Operating System: Unknown/Multiple | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | Blocking: Blocked By: | Differential Revisions: Related Tickets: | -------------------------------------+------------------------------------- Comment (by simonpj): This definitely should not work; it requires impredicative polymoprhism which GHC does not properly support. The error message is bad, and I'll try to fix that, but I don't think it's urgent for 7.10. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9981#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler