[GHC] #14579: GeneralizedNewtypeDeriving produces ambiguously-kinded code

GHC ghc-devs at haskell.org
Wed Oct 17 22:29:30 UTC 2018


#14579: GeneralizedNewtypeDeriving produces ambiguously-kinded code
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        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:                    |
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Comment (by simonpj):

 Yes indeed.  comment:3 identifies VKA as the desired facility, with kind
 signatures as second best.  Good idea to re-open

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14579#comment:13>
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