[GHC] #11274: Confused type checker with typed holes and a missing instance (also panic)

[GHC]

#11274: Confused type checker with typed holes and a missing instance (also panic)
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        Reporter:  Xandaros          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"ed213ead5e92aa3c2ae830a00f06684a1028d3ad/ghc"
 ed213ead/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ed213ead5e92aa3c2ae830a00f06684a1028d3ad"
 Test Trac #11274
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11274#comment:1>
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