[GHC] #5929: Exciting arity warning when compiling with optimizations

[GHC]

#5929: Exciting arity warning when compiling with optimizations
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    Reporter:  passalaqua        |       Owner:                                   
        Type:  bug               |      Status:  new                              
    Priority:  normal            |   Milestone:                                   
   Component:  Compiler          |     Version:  7.4.1                            
    Keywords:  Exciting arity    |          Os:  Unknown/Multiple                 
Architecture:  Unknown/Multiple  |     Failure:  Incorrect warning at compile-time
  Difficulty:  Unknown           |    Testcase:                                   
   Blockedby:                    |    Blocking:                                   
     Related:                    |  
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Changes (by simonmar):

  * difficulty:  => Unknown


Comment:

 What we normally do is put calls to `pprTrace` inside `#ifdef DEBUG`, that
 would be an easy fix here.  The point of `-dno-debug-output` is so that
 the testsuite still works with a DEBUG compiler.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5929#comment:2>
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