[GHC] #4953: panic: urk! lookup local fingerprint main:B.throwErr{v rR3}

[GHC]

#4953: panic: urk! lookup local fingerprint main:B.throwErr{v rR3}
---------------------------------+------------------------------------------
    Reporter:  igloo             |        Owner:              
        Type:  bug               |       Status:  new         
    Priority:  highest           |    Milestone:  7.0.2       
   Component:  Compiler          |      Version:  7.0.1       
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------

Comment(by igloo):

 Right, it only happens with the 7.0 branch.

 I can still reproduce it.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4953#comment:2>
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