[GHC] #13292: Type checker rejects ambiguous top level declaration.

[GHC]

#13292: Type checker rejects ambiguous top level declaration.
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        Reporter:  jeiea             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rwbarton):

 Thanks. `-fdefer-type-errors` is also needed to reproduce (presumably you
 have this set in a `.ghci` file).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13292#comment:4>
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