[GHC] #10897: Incorrect ASSERT for buildPatSyn

[GHC]

#10897: Incorrect ASSERT for buildPatSyn
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        Reporter:  ezyang            |                Owner:  cactus
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.11
  checker)                           |             Keywords:
      Resolution:                    |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
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Comment (by Matthew Pickering <matthewtpickering@…>):

 In [changeset:"6c9258def53008f050e91e6d3e08c4c297392c00/ghc" 6c9258d/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6c9258def53008f050e91e6d3e08c4c297392c00"
 Add test for #10897
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10897#comment:4>
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