[GHC] #3405: ghc: panic! FamInstEnv.pprFamInstHdr

[GHC]

#3405: ghc: panic!  FamInstEnv.pprFamInstHdr
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 Reporter:  dsf               |          Owner:                  
     Type:  bug               |         Status:  new             
 Priority:  normal            |      Milestone:                  
Component:  Compiler          |        Version:  6.10.4          
 Severity:  normal            |     Resolution:                  
 Keywords:                    |       Testcase:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
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Comment (by dsf):

 We believe this was probably caused by mixing compiled and loaded versions
 of the same packages.  Whether it is "correct" for this to provoke to an
 impossible error I can not say.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3405#comment:1>
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