[GHC] #14132: Report an error for a missing class instance before an error for type family instances of an associated type.

[GHC]

#14132: Report an error for a missing class instance before an error for type
family instances of an associated type.
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        Reporter:  duog              |                Owner:  duog
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 OK #14149 is fixed, so you can have another go.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14132#comment:7>
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