[GHC] #5362: ghc: panic! mkUsageInfo: internal name? constr_a2Py{v}

[GHC]

#5362: ghc: panic! mkUsageInfo: internal name? constr_a2Py{v}
------------------------------------------------------------------+---------
    Reporter:  markwright                                         |       Owner:                    
        Type:  bug                                                |      Status:  new               
    Priority:  normal                                             |   Component:  Compiler          
     Version:  7.1                                                |    Keywords:  panic mkUsageInfo 
    Testcase:  http://hackage.haskell.org/package/syb-with-class  |   Blockedby:                    
          Os:  Linux                                              |    Blocking:                    
Architecture:  x86_64 (amd64)                                     |     Failure:  Compile-time crash
------------------------------------------------------------------+---------
Changes (by slyfox):

 * cc: slyfox@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5362#comment:1>
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