[GHC] #14246: Probably AllowAmbiguousTypes + UndecidableInstances + TypeInType

[GHC]

#14246: Probably AllowAmbiguousTypes + UndecidableInstances + TypeInType
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        Reporter:  Toricon           |                Owner:  (none)
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13271            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ryan Scott <ryan.gl.scott@…>):

 In [changeset:"9ed7e8d6a31b96ea2f171f1ad064294ee618b032/ghc"
 9ed7e8d6/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="9ed7e8d6a31b96ea2f171f1ad064294ee618b032"
 Add regression test for #14246
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14246#comment:6>
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