[GHC] #7171: erroneous overlapping instances reported with FunDeps

[GHC]

#7171: erroneous overlapping instances reported with FunDeps
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    Reporter:  jwlato                   |       Owner:                           
        Type:  bug                      |      Status:  new                      
    Priority:  normal                   |   Milestone:                           
   Component:  Compiler (Type checker)  |     Version:  7.6.1-rc1                
    Keywords:  type classes, fundeps    |          Os:  Unknown/Multiple         
Architecture:  Unknown/Multiple         |     Failure:  GHC rejects valid program
  Difficulty:  Unknown                  |    Testcase:                           
   Blockedby:                           |    Blocking:                           
     Related:                           |  
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Changes (by simonpj):

  * difficulty:  => Unknown


Comment:

 Thanks. Happily I believe this is already fixed -- at least your test case
 works for me; I think the fix was the one for #7128.  And the symptoms
 look very much like #7150, which also works now.

 If you can try with HEAD that'd be great.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7171#comment:1>
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