#14579: GeneralizedNewtypeDeriving produces ambiguously-kinded code -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.2.2 checker) | Resolution: | Keywords: deriving Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | deriving/should_compile/T14579 Blocked By: 12045 | Blocking: Related Tickets: | Differential Rev(s): Phab:D4264 Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): I've responded to comment:16 at https://phabricator.haskell.org/D5229#inline-42631. (The code is very nearly correct; you just need some minor tweaks to make it compile). Also, thanks for adding a test case for this! Once the VKA patch lands, I can look into tweaking `GeneralizedNewtypeDeriving` itself such that it generates code with visible kind applications. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14579#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler