[GHC] #8548: Coercible does not resolve type family application

[GHC]

#8548: Coercible does not resolve type family application
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        Reporter:  nomeata                  |            Owner:  nomeata
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:
       Component:  Compiler (Type checker)  |          Version:  7.6.3
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:  8503                     |       Blocked By:
                                            |  Related Tickets:  #8503
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Comment (by nomeata):

 (Also breaks the test case for #5955, #2856 and test case
 `DerivingNewType`)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8548#comment:2>
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