[GHC] #2226: duplicate samples in heap profiling (-hc) output on 6.8.2

[GHC]

#2226: duplicate samples in heap profiling (-hc) output on 6.8.2
-------------------------------+--------------------------------------------
    Reporter:  clemens         |       Owner:           
        Type:  bug             |      Status:  new      
    Priority:  normal          |   Component:  Profiling
     Version:  6.8.2           |    Severity:  normal   
    Keywords:                  |    Testcase:           
Architecture:  x86_64 (amd64)  |          Os:  Unknown  
-------------------------------+--------------------------------------------
 I tried to catch a bug in xmonad by using heap profiling (-hc). Compiled
 all libraries with -prof -auto-all. The .hp output seems broken as samples
 are written to the file multiple times. See attached example of xmonad.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2226>
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