[GHC] #11655: Ambiguous types in pattern synonym not determined by functional dependencies

[GHC]

#11655: Ambiguous types in pattern synonym not determined by functional
dependencies
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        Reporter:  Iceland_jack      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |             Keywords:
      Resolution:                    |  PatternSynonyms,
                                     |  FunctionalDependencies, GADTs
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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Changes (by thomie):

 * keywords:   => PatternSynonyms, FunctionalDependencies, GADTs
 * cc: mpickering (added)
 * component:  Compiler => Compiler (Type checker)


Comment:

 Inferred type is still rejected in 8.1.20160503.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11655#comment:1>
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