[GHC] #8978: Type synonyms in class associated types behave strangely

[GHC]

#8978: Type synonyms in class associated types behave strangely
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        Reporter:  joelteon                   |            Owner:
            Type:  bug                        |           Status:  closed
        Priority:  highest                    |        Milestone:  7.8.2
       Component:  Compiler                   |          Version:  7.8.1
      Resolution:  fixed                      |         Keywords:
Operating System:  Unknown/Multiple           |     Architecture:
 Type of failure:  GHC rejects valid program  |  Unknown/Multiple
       Test Case:                             |       Difficulty:  Unknown
        Blocking:                             |       Blocked By:
                                              |  Related Tickets:
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Comment (by Lemming):

 Replying to [comment:17 simonpj]:
 > The fix is merged on the 7.8.2 branch, so you can build it and try.  I
 don't know if anyone has a pre-built binary distribution for your platform
 though.

 I can confirm that the problems are gone with the ghc-7.8.1.20140410 built
 by Michael Snoyman.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8978#comment:18>
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