[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:  new
        Priority:  normal                     |        Milestone:
       Component:  Compiler                   |          Version:  7.8.1
      Resolution:                             |         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:8 simonpj]:
 > Ugh.  This is my fault; an egregious blunder in a (cool) clean-up of the
 type flattener. It's easy to fix (patch coming) but the bug is in the
 released 7.8.1.  Will fix in 7.8.2.  It just shows, you never have enough
 regression tests!

 Will there be a "nightly snapshot build" for easy testing of the bugfix?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8978#comment:9>
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