[GHC] #14552: GHC panic on pattern synonym

[GHC]

#14552: GHC panic on pattern synonym
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
                                     |  PatternSynonyms, TypeInType,
                                     |  ViewPatterns
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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Comment (by simonpj):

 PS

 > Interestingly, matcher2 does not type check without this inlining:

 It does for me!
 {{{
 matcher3 (T (($ 3) -> x)) k = k x
 }}}
 typechecks just fine with inferred type
 {{{
 matcher3 :: forall a t. T -> ((a -> a) -> t) -> t
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14552#comment:5>
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