[GHC] #9922: Partial type signatures + extensions panic

[GHC]

#9922: Partial type signatures + extensions panic
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              Reporter:  monoidal    |            Owner:  thomasw
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
  (Type checker)                     |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Compile-    |  Related Tickets:
  time crash                         |
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D595   |
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Comment (by thomasw):

 Thanks for finding all the panics I caused :)
 I fixed it in Phab:D595.

 Happy holidays.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9922#comment:3>
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