[GHC] #7428: Occurrence analyzer out of memory

[GHC]

#7428: Occurrence analyzer out of memory
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    Reporter:  nudded          |       Owner:                    
        Type:  bug             |      Status:  new               
    Priority:  normal          |   Milestone:                    
   Component:  Compiler        |     Version:  7.4.2             
    Keywords:                  |          Os:  MacOS X           
Architecture:  x86_64 (amd64)  |     Failure:  Compile-time crash
  Difficulty:  Unknown         |    Testcase:                    
   Blockedby:                  |    Blocking:                    
     Related:                  |  
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Changes (by simonpj):

  * difficulty:  => Unknown


Comment:

 Thank you.  We know there's a performance bug in the occurrence analyser
 (see #7258), but it's very helpful to have a small case that tickles it.
 Two questions
  * How do you know it's the occurrence analyser at fault?
  * Can you be specific about the changes you made to the test program that
 showed you the memory behaviour was exponential (ugh).

 Thanks

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7428#comment:2>
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