[GHC] #11762: GHC 8 superclass chain constraint regression

[GHC]

#11762: GHC 8 superclass chain constraint regression
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        Reporter:  _deepfire         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * cc: simonpj (added)
 * priority:  high => highest


Comment:

 Pinging simonpj.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11762#comment:2>
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