[GHC] #10403: GHC crashes on a partial type signature

[GHC]

#10403: GHC crashes on a partial type signature
-------------------------------------+-------------------------------------
        Reporter:  Artyom.Kazak      |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by Artyom.Kazak):

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


Comment:

 Can the testcase in Simon's `Test Trac #10403` commit be changed to how it
 should be? `h :: _ => _` doesn't trigger the bug, only `h :: _` does (and
 I don't know why Simon changed it).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10403#comment:9>
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