[GHC] #3961: -O results in incorrect behavior

[GHC]

#3961: -O results in incorrect behavior
-------------------------+--------------------------------------------------
    Reporter:  RichardG  |        Owner:  simonpj                    
        Type:  bug       |       Status:  new                        
    Priority:  high      |    Milestone:  6.14.1                     
   Component:  Compiler  |      Version:  6.12.1                     
    Keywords:            |     Testcase:                             
   Blockedby:  3959      |   Difficulty:                             
          Os:  MacOS X   |     Blocking:                             
Architecture:  x86       |      Failure:  Incorrect result at runtime
-------------------------+--------------------------------------------------
Changes (by igloo):

  * blockedby:  => 3959


-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3961#comment:10>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler