[GHC] #11552: ScopedTypeVariables / InstanceSigs do not work in GHC 8.0

[GHC]

#11552: ScopedTypeVariables / InstanceSigs do not work in GHC 8.0
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        Reporter:  bitemyapp         |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  8.0.1-rc1
      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 goldfire):

 * owner:   => goldfire


Comment:

 I think I know what caused this regression, and there's no good reason for
 it. It is simple, so I'll add this to my queue. (I'm 98% sure that this is
 caused by my changes to the parser in order to account for the kind `*`.)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11552#comment:4>
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