[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                       |      Component:  Compiler (Type checker)
  Version:  7.6.1                        |       Keywords:                         
       Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple       
  Failure:  GHC accepts invalid program  |       Testcase:                         
Blockedby:                               |       Blocking:                         
  Related:                               |  
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Changes (by goldfire):

 * cc: eir@… (added)


Comment:

 The second problem you mention (about the spurious warning of an
 incomplete pattern) is already known. See #3927.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7294#comment:3>
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