[GHC] #1465: Type errors due to different package versions are a bit cryptic

[GHC]

#1465: Type errors due to different package versions are a bit cryptic
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    Reporter:  guest                    |        Owner:             
        Type:  bug                      |       Status:  new        
    Priority:  normal                   |    Milestone:  6.8        
   Component:  Compiler (Type checker)  |      Version:  6.6.1      
    Severity:  normal                   |   Resolution:             
    Keywords:                           |   Difficulty:  Easy (1 hr)
          Os:  Unknown                  |     Testcase:  tcfail182  
Architecture:  Unknown                  |  
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Comment (by simonpj):

 Trouble is, that's just the problem 'guest' reported. It's not enough to
 say that `Display` imported from `M` does not match `Display` imported
 from `Y`!  We want to say where `Display` originally came from.

 We could readily suppress the module name if the package names are
 different though.  That way we'd only show the defining modules if both
 names came from the same package.  Would that be better?

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1465>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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