[GHC] #12923: MultiParamTypeClasses + ExtendedDefaultRules

[GHC]

#12923: MultiParamTypeClasses + ExtendedDefaultRules
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        Reporter:  amindfv           |                Owner:
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2822
       Wiki Page:                    |
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Comment (by bgamari):

 This is the sort of change that the proposal process was designed to
 consider. That being said, this particular change is fairly small in scope
 and it is quite late in the 8.2 cycle. If no one else objects I would be
 willing to forgo the proposal and merge Phab:D2822.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12923#comment:11>
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