[GHC] #15799: GHC panic (and warnings)

[GHC]

#15799: GHC panic (and warnings)
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.10.1
       Component:  Compiler          |              Version:  8.6.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  typecheck/should_fail/T15799
      Blocked By:                    |             Blocking:
 Related Tickets:  #12045            |  Differential Rev(s):  Phab:D5229
       Wiki Page:                    |
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Comment (by simonpj):

 Just to note: the underlying bug is not fixed, but it's asleep.  See
 #15918 for more details

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15799#comment:12>
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