[GHC] #12646: Type family reification misses a kind signature

[GHC]

#12646: Type family reification misses a kind signature
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        Reporter:  goldfire          |                Owner:
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Template Haskell  |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8953             |  Differential Rev(s):  Phab:D2795
       Wiki Page:                    |
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Comment (by Ryan Scott <ryan.gl.scott@…>):

 In [changeset:"f65ff2c4c9b60e370a722ac7572186816e23e573/ghc"
 f65ff2c4/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f65ff2c4c9b60e370a722ac7572186816e23e573"
 Disambiguate reified closed type family kinds in TH

 Summary:
 A continuation of #8953. This fixes an oversight in which the
 left-hand sides of closed type families, when reified in Template Haskell,
 would not be given kind annotations, even when they are necessary for
 disambiguation purposes in the presence of `PolyKinds`.

 Fixes #8953 and #12646.

 Test Plan: ./validate

 Reviewers: hvr, bgamari, austin, goldfire

 Reviewed By: goldfire

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2795

 GHC Trac Issues: #8953, #12646
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12646#comment:4>
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