[GHC] #10990: Checking whether a default declaration is an instance of a defaultable typeclass is broken

[GHC]

#10990: Checking whether a default declaration is an instance of a defaultable
typeclass is broken
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        Reporter:  kanetw            |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  low               |            Milestone:
       Component:  Compiler (Type    |              Version:  7.10.2
  checker)                           |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by harpocrates):

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


Comment:

 Fixed in 9a34bf1985035858ece043bf38b47b6ff4b88efb (I think, although I
 haven't compiled before and after to check). At the very least, that
 commit added test cases demonstrating this to be solved.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10990#comment:3>
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