[GHC] #8162: Type unsoundness with type families and UndecidableInstances

[GHC]

#8162: Type unsoundness with type families and UndecidableInstances
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        Reporter:  akio                         |            Owner:
            Type:  bug                          |           Status:  closed
        Priority:  normal                       |        Milestone:
       Component:  Compiler (Type checker)      |          Version:  7.6.3
      Resolution:  fixed                        |         Keywords:
Operating System:  Unknown/Multiple             |     Architecture:
 Type of failure:  GHC accepts invalid program  |  Unknown/Multiple
       Test Case:                               |       Difficulty:
        Blocking:                               |  Unknown
                                                |       Blocked By:
                                                |  Related Tickets:
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Changes (by akio):

 * status:  new => closed
 * resolution:   => fixed


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8162#comment:1>
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