[GHC] #13262: Allow type synonym family application in instance head if it has no free variables

[GHC]

#13262: Allow type synonym family application in instance head if it has no free
variables
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        Reporter:  ezyang            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:  backpack
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:  12680
 Related Tickets:  13773             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by Artyom.Kazak):

 * related:   => 13773


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13262#comment:14>
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