[GHC] #3822: guards in arrow notation (Arrows extension) case statement cause compiler panic

[GHC]

#3822: guards in arrow notation (Arrows extension) case statement cause compiler
panic
-----------------------------------------+----------------------------------
    Reporter:  StephenBlackheath         |        Owner:  ross              
        Type:  bug                       |       Status:  new               
    Priority:  normal                    |    Milestone:  6.12.2            
   Component:  Compiler                  |      Version:  6.12.1            
    Keywords:  arrows guards case panic  |   Difficulty:                    
          Os:  Unknown/Multiple          |     Testcase:  patternGuard.hs   
Architecture:  Unknown/Multiple          |      Failure:  Compile-time crash
-----------------------------------------+----------------------------------
Changes (by igloo):

  * milestone:  => 6.12.2


-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3822#comment:6>
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