[GHC] #7294: -fdefer-type-errors doesn't produce a warning

[GHC]

#7294: -fdefer-type-errors doesn't produce a warning
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  Reporter:  Feuerbach                    |          Owner:                  
      Type:  bug                          |         Status:  new             
  Priority:  normal                       |      Milestone:                  
 Component:  Compiler (Type checker)      |        Version:  7.6.1           
Resolution:                               |       Keywords:                  
        Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple
   Failure:  GHC accepts invalid program  |     Difficulty:  Unknown         
  Testcase:                               |      Blockedby:                  
  Blocking:                               |        Related:                  
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Changes (by simonmar):

  * status:  closed => new
  * resolution:  duplicate =>


Comment:

 The second problem mentioned is #3927, but the first problem is still
 unresolved, right?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7294#comment:5>
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