#10194: Shouldn't this require ImpredicativeTypes? -------------------------------------+------------------------------------- Reporter: kosmikus | Owner: Type: bug | Status: merge Priority: normal | Milestone: 7.10.2 Component: Compiler (Type | Version: 7.8.4 checker) | Keywords: Resolution: fixed | Architecture: Operating System: Unknown/Multiple | Unknown/Multiple Type of failure: GHC accepts | Test Case: invalid program | typecheck/should_fail/T10194 Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by adamgundry): Thanks! Indeed, those look like impredicative instantiations of `(.)` that should require `ImpredicativeTypes`. I think we should keep the patch, and flag up this issue in the release notes, although the error message makes it fairly obvious how to fix the problem. :-) Or should we be more concerned about maintaining support for existing programs, given that this is a bugfix release? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10194#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler