[GHC] #9226: Internal error when using equality constraint in pattern synonyms

[GHC]

#9226: Internal error when using equality constraint in pattern synonyms
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        Reporter:  Iceland_jack      |            Owner:
            Type:  bug               |           Status:  new
        Priority:  lowest            |        Milestone:
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:  renamer, pattern
Operating System:  Linux             |  synonyms, GADTs
 Type of failure:  GHC rejects       |     Architecture:  x86
  valid program                      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  #8968
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Changes (by kosmikus):

 * related:   => #8968


Comment:

 Also see #8968 for my own experiences trying to use pattern synonyms for
 GADTs and lots of discussion.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9226#comment:2>
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