[GHC] #11122: Ambiguous inferred type causes a panic

[GHC]

#11122: Ambiguous inferred type causes a panic
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        Reporter:  tuplanolla        |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.10.2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10615            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Added testcase in Phab:D1655

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11122#comment:6>
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