[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:  closed
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  8.0.1-rc1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  typecheck/should_compile/T11552
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"c9ac9de78254fb6bf463fd6370be7a7214b3e649/ghc"
 c9ac9de7/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c9ac9de78254fb6bf463fd6370be7a7214b3e649"
 Test Trac #11552
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11552#comment:6>
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