[GHC] #5656: Biographical profiling broken in 7.2.1

[GHC]

#5656: Biographical profiling broken in 7.2.1
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    Reporter:  diatchki                |        Owner:                             
        Type:  bug                     |       Status:  infoneeded                 
    Priority:  normal                  |    Milestone:                             
   Component:  Profiling               |      Version:  7.2.1                      
    Keywords:  biographical profiling  |     Testcase:                             
   Blockedby:                          |   Difficulty:                             
          Os:  Linux                   |     Blocking:                             
Architecture:  x86_64 (amd64)          |      Failure:  Incorrect result at runtime
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Comment(by simonmar):

 I have tried a program with a space leak, and can't reproduce it.  Looking
 at the code I can see how some of the calculations might overflow on a
 64-bit machine, but not until a heap size of about 16Gb.  I'll fix these
 anyway, but from your results it looks more like a bug in the calculations
 (something has gone negative) than an integer overflow.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5656#comment:3>
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