[GHC] #13381: "opt_univ fell into a hole" panic from rewrite rule

[GHC]

#13381: "opt_univ fell into a hole" panic from rewrite rule
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * cc: goldfire (added)


Comment:

 Commit 6746549772c5cc0ac66c0fce562f297f4d4b80a2 (Add kind equalities to
 GHC) introduced this regression.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13381#comment:2>
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