[GHC] #6082: Program compiled with 7.4.1 runs many times slower than compiled with 7.2.2

[GHC]

#6082: Program compiled with 7.4.1 runs many times slower than compiled with 7.2.2
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  Reporter:  gchrupala                |          Owner:  pcapriotti      
      Type:  bug                      |         Status:  new             
  Priority:  high                     |      Milestone:  7.6.1           
 Component:  libraries (other)        |        Version:  7.4.1           
Resolution:                           |       Keywords:                  
        Os:  Unknown/Multiple         |   Architecture:  Unknown/Multiple
   Failure:  Runtime performance bug  |     Difficulty:  Unknown         
  Testcase:                           |      Blockedby:                  
  Blocking:                           |        Related:                  
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Comment(by simonpj):

 Done!  Library still needs changing -- and the libraries where this shows
 up a potential bug.  Paolo will do this.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6082#comment:14>
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