[GHC] #5320: check_overlap panic (7.1 regression)

[GHC]

#5320: check_overlap panic (7.1 regression)
-------------------------------------+-------------------------------------
              Reporter:              |            Owner:  simonpj
  mikhail.vorozhtsov                 |           Status:  new
                  Type:  bug         |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.1
             Component:  Compiler    |         Keywords:
  (Type checker)                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Unknown
      Operating System:              |       Blocked By:
  Unknown/Multiple                   |  Related Tickets:
       Type of failure:  Compile-    |
  time crash                         |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by thomie):

 * difficulty:   => Unknown
 * component:  Compiler => Compiler (Type checker)


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5320#comment:14>
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