#14579: GeneralizedNewtypeDeriving produces ambiguously-kinded code -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.10.1 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{a} Blocked By: 12045 | Blocking: Related Tickets: | Differential Rev(s): Phab:D4264, Wiki Page: | Phab:D5229 -------------------------------------+------------------------------------- Changes (by RyanGlScott): * testcase: deriving/should_compile/T14579 => deriving/should_compile/T14579{a} * differential: Phab:D4264 => Phab:D4264, Phab:D5229 Comment: A test case was added in [https://gitlab.haskell.org/ghc/ghc/commit/17bd163566153babbf51adaff8397f948a... 17bd163566153babbf51adaff8397f948ae363ca]: {{{ Author: mynguyen <mnguyen1@brynmawr.edu> Date: Tue Dec 18 11:52:26 2018 -0500 Visible kind application Summary: This patch implements visible kind application (GHC Proposal 15/#12045), as well as #15360 and #15362. It also refactors unnamed wildcard handling, and requires that type equations in type families in Template Haskell be written with full type on lhs. PartialTypeSignatures are on and warnings are off automatically with visible kind application, just like in term-level. There are a few remaining issues with this patch, as documented in ticket #16082. Includes a submodule update for Haddock. Test Plan: Tests T12045a/b/c/TH1/TH2, T15362, T15592a Reviewers: simonpj, goldfire, bgamari, alanz, RyanGlScott, Iceland_jack Subscribers: ningning, Iceland_jack, RyanGlScott, int-index, rwbarton, mpickering, carter GHC Trac Issues: `#12045`, `#15362`, `#15592`, `#15788`, `#15793`, `#15795`, `#15797`, `#15799`, `#15801`, `#15807`, `#15816` Differential Revision: https://phabricator.haskell.org/D5229 }}} To ensure that the code in comment:12 actually typechecks. However, the task of making `GeneralizedNewtypeDeriving` actually generate this code remains to be done. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14579#comment:19> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler