[GHC] #12151: GHC 8 allows ambiguous type without AllowAmbiguousTypes

[GHC]

#12151: GHC 8 allows ambiguous type without AllowAmbiguousTypes
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        Reporter:  thomie            |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Incorrect         |            Test Case:
  warning at compile-time            |  typecheck/should_fail/T12151
      Blocked By:                    |             Blocking:
 Related Tickets:  #7437             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  merge => closed
 * resolution:   => fixed


Comment:

 Merged as 8540c65a61e92e9c4bedb934c241e8e3eaa67047.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12151#comment:3>
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