[GHC] #1808: type families: impossible happened, at runtime in GHCi

[GHC]

#1808: type families: impossible happened, at runtime in GHCi
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 Reporter:  guest     |          Owner:  chak   
     Type:  bug       |         Status:  new    
 Priority:  normal    |      Milestone:         
Component:  Compiler  |        Version:  6.8    
 Severity:  normal    |     Resolution:         
 Keywords:            |     Difficulty:  Unknown
 Testcase:            |   Architecture:  x86    
       Os:  Linux     |  
----------------------+-----------------------------------------------------
Changes (by chak):

  * owner:  => chak

Comment:

 Probably the same problem as #1754.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1808#comment:2>
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