[GHC] #5561: assertion overriden by other exceptions

[GHC]

#5561: assertion overriden by other exceptions
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  Reporter:  MikolajKonarski              |          Owner:                
      Type:  bug                          |         Status:  new           
  Priority:  normal                       |      Milestone:                
 Component:  Compiler                     |        Version:  7.3           
Resolution:                               |       Keywords:                
  Testcase:                               |      Blockedby:                
Difficulty:                               |             Os:  Linux         
  Blocking:                               |   Architecture:  x86_64 (amd64)
   Failure:  Incorrect result at runtime  |  
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Comment(by simonmar):

 Tricky one, but I think we should "fix" it with `lazy` as suggested, and
 put a comment pointing to this ticket next to the fix.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5561#comment:5>
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