[GHC] #10438: GHC 7.10.1 panic due to PartialTypeSignatures, TypeFamilies, and local bindings

[GHC]

#10438: GHC 7.10.1 panic due to PartialTypeSignatures, TypeFamilies, and local
bindings
-------------------------------------+-------------------------------------
        Reporter:  rpglover64        |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.10.3
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Compile-time      |               Test Case:  partial-
  crash                              |  sigs/should_compile/T10438
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by rpglover64):

 It seems like cherry picking said patch onto the ghc-7.10 branch fixes the
 bug (running tests locally now to make sure it doesn't break anything
 else), but I don't know what the correct workflow is in this case.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10438#comment:7>
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