[GHC] #15318: Core Lint error involving newtype family instances with wrappers

[GHC]

#15318: Core Lint error involving newtype family instances with wrappers
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler (Type    |              Version:  8.4.3
  checker)                           |
      Resolution:                    |             Keywords:  TypeFamilies
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:  indexed-
  crash or panic                     |  types/should_compile/T15318
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4902
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * status:  new => merge
 * testcase:   => indexed-types/should_compile/T15318


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15318#comment:4>
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