[GHC] #10971: ExtendedDefaultRules defaults to [] for Foldable/Traversable

[GHC]

#10971: ExtendedDefaultRules defaults to [] for Foldable/Traversable
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        Reporter:  kanetw            |                Owner:  kanetw
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10963            |  Differential Rev(s):  phab:D1329
       Wiki Page:                    |
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Comment (by Thomas Miedema <thomasmiedema@…>):

 In [changeset:"bb7e93c9c78bdf746e34cf6715eeffa6dd5682de/ghc" bb7e93c/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="bb7e93c9c78bdf746e34cf6715eeffa6dd5682de"
 Extended default rules now specialize Foldable, Traversable to [] (#10971)

 Default rules deliberately accept any kind.

 Reviewed By: simonpj, thomie, goldfire

 Differential Revision: https://phabricator.haskell.org/D1329
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10971#comment:8>
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