[GHC] #13041: Type classes in Backpack signatures are dodgy

[GHC]

#13041: Type classes in Backpack signatures are dodgy
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                Owner:  ezyang
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:  backpack
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:2925
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by ezyang):

 * status:  new => patch
 * differential:   => Phab:2925


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13041#comment:1>
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