[GHC] #13929: GHC panic with levity polymorphism

[GHC]

#13929: GHC panic with levity polymorphism
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        Reporter:  vagarenko         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.2
       Component:  Compiler          |              Version:  8.2.1-rc2
      Resolution:                    |             Keywords:  TypeInType,
                                     |  LevityPolymorphism
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by vagarenko):

 Replying to [comment:14 bgamari]:

 Now I see. Thank you for the very thorough explanation!


 Replying to [comment:10 Ben Gamari <ben@…>]:
 > In [changeset:"fa626f3b1c1140a1f10bba60fdde10f767863f70/ghc"
 fa626f3/ghc]:
 > {{{
 > #!CommitTicketReference repository="ghc"
 revision="fa626f3b1c1140a1f10bba60fdde10f767863f70"
 > Fix #13929 by adding another levity polymorphism check
 >
 > test case: typecheck/should_fail/T13929
 > }}}


 Have you tested that patch with unboxed sums? See my comment:8

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13929#comment:16>
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