[GHC] #3715: GHC API no longer exports location information for error/warning messages

[GHC]

#3715: GHC API no longer exports location information for error/warning messages
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  Reporter:  greenrd                  |          Owner:                  
      Type:  bug                      |         Status:  new             
  Priority:  normal                   |      Milestone:                  
 Component:  GHC API                  |        Version:  6.12.1 RC1      
Resolution:                           |       Keywords:                  
Difficulty:  Easy (less than 1 hour)  |             Os:  Unknown/Multiple
  Testcase:                           |   Architecture:  Unknown/Multiple
   Failure:  Other                    |  
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Comment (by greenrd):

 In addition, it can no longer show the message in "unqualified" style,
 because "show" ignores the errMsgContext.

 So maybe all the fields of ErrMsg should be exported, to get us back to
 where we were in 6.10?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3715#comment:1>
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