[GHC] #7557: Default implementation for a type class function missing when profiling is enabled

[GHC]

#7557: Default implementation for a type class function missing when profiling is
enabled
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    Reporter:  JohnWiegley       |       Owner:                  
        Type:  bug               |      Status:  new             
    Priority:  normal            |   Milestone:                  
   Component:  Compiler          |     Version:  7.6.1           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Changes (by simonpj):

  * difficulty:  => Unknown


Comment:

 Urgh.  So many dependencies!  Can you:
  * Do `ghc --show-iface` on `Data/Git/Internal.hi`
  * Compile `Data.Git.Internal` with `-ddump-simpl`
  * Compile `Data.Git.Blob` with `-ddump-ds -ddump-simpl`
 and let me have the output?  thanks.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7557#comment:1>
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