[GHC] #3150: Overlapping data instances can segfault

[GHC]

#3150: Overlapping data instances can segfault
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 Reporter:  guest                    |          Owner:                  
     Type:  bug                      |         Status:  new             
 Priority:  normal                   |      Milestone:                  
Component:  Compiler (Type checker)  |        Version:  6.10.1          
 Severity:  normal                   |     Resolution:                  
 Keywords:                           |       Testcase:                  
       Os:  Unknown/Multiple         |   Architecture:  Unknown/Multiple
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Comment (by guest):

 I forgot to mention that was run with

 ghci Foo.hs -XTypeFamilies -XFlexibleInstances

 -- it didn't even require OverlappingInstances

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3150#comment:1>
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