#9761: A module can't usefully use both GeneralizedNewtypeDeriving and DeriveFoldable -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: Component: Core | Version: 7.9 Libraries | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: GHC | Related Tickets: rejects valid program | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rwbarton): (To clarify, "this" = the fact that Foldable's parameter has type role nominal in HEAD, preventing GND. In 7.8 it has role representational, as it should.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9761#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler