[GHC] #12546: GeneralizedNewtypeDeriving produces error messages with incorrect kind signatures

[GHC]

#12546: GeneralizedNewtypeDeriving produces error messages with incorrect kind
signatures
-------------------------------------+-------------------------------------
        Reporter:  lexi.lambda       |                Owner:  mniip
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2484
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"8d00175f4ba969ca5f4edf26b0e8593a79d4f508/ghc" 8d00175/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8d00175f4ba969ca5f4edf26b0e8593a79d4f508"
 Less scary arity mismatch error message when deriving

 Test Plan: Corrected a few tests to include the new message.

 Reviewers: goldfire, austin, bgamari

 Reviewed By: bgamari

 Subscribers: goldfire, thomie

 Differential Revision: https://phabricator.haskell.org/D2484

 GHC Trac Issues: #12546
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12546#comment:6>
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