[GHC] #12826: TyVar ASSERT failure in type family checking: T12041

[GHC]

#12826: TyVar ASSERT failure in type family checking: T12041
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        Reporter:  simonpj           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Marlow <marlowsd@…>):

 In [changeset:"642adec4da8df4ae39b884b30c47284a3c9d0f30/ghc"
 642adec4/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="642adec4da8df4ae39b884b30c47284a3c9d0f30"
 Mark T12041 as expect_broken with -DDEBUG (#12826)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12826#comment:1>
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