[GHC] #16221: Core Lint error with a data type

[GHC]

#16221: Core Lint error with a data type
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        Reporter:  monoidal          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.7
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #16342            |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/444
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * differential:   => https://gitlab.haskell.org/ghc/ghc/merge_requests/444
 * related:   => #16342


Comment:

 This was allegedly fixed in
 [https://gitlab.haskell.org/ghc/ghc/commit/80dfcee61e3bfb67f131cd674f96467e16c0f9d8
 80dfcee6], although a test case has yet to materialize.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16221#comment:4>
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