[GHC] #2677: Detection of TF instance conflict depends on instance order

[GHC]

#2677: Detection of TF instance conflict depends on instance order
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    Reporter:  reinerp                  |        Owner:  chak            
        Type:  bug                      |       Status:  closed          
    Priority:  normal                   |    Milestone:  6.12 branch     
   Component:  Compiler (Type checker)  |      Version:  6.9             
    Severity:  normal                   |   Resolution:  fixed           
    Keywords:  TF instance conflict     |   Difficulty:  Unknown         
    Testcase:  T2677                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple         |  
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Changes (by chak):

  * testcase:  => T2677

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2677#comment:7>
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