[GHC] #7437: peculiar behaviour with default instances and type variables

[GHC]

#7437: peculiar behaviour with default instances and type variables
-------------------------------------+-------------------------------------
        Reporter:  bos               |                Owner:  simonpj
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Test Suite        |              Version:  7.6.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC accepts       |            Test Case:
  invalid program                    |  typecheck/should_fail/T7437
      Blocked By:                    |             Blocking:
 Related Tickets:  #12151            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by simonpj):

 * testcase:   => typecheck/should_fail/T7437
 * status:  new => closed
 * resolution:   => fixed


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7437#comment:11>
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