[GHC] #15138: Unable to instantiate data members of kind Nat in backpack signatures.

[GHC]

#15138: Unable to instantiate data members of kind Nat in backpack signatures.
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        Reporter:  ppk               |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4951
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  new => patch
 * differential:   => Phab:D4951
 * milestone:  8.8.1 => 8.6.1


Comment:

 This looks simple enough that I think we can sneak it in to 8.6.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15138#comment:2>
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