[GHC] #13343: Levity polymorphism-related GHC panic: expectJust zonkTcTyVarToVar

[GHC]

#13343: Levity polymorphism-related GHC panic: expectJust zonkTcTyVarToVar
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        Reporter:  RyanGlScott       |                Owner:  goldfire
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |             Keywords:
      Resolution:                    |  LevityPolymorphism
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |  typecheck/should_compile/T13343
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by goldfire):

 * status:  new => merge
 * testcase:   => typecheck/should_compile/T13343
 * milestone:   => 8.2.1


Comment:

 My comment:1 gets it all wrong, but it was simple in the end.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13343#comment:4>
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