[GHC] #15800: Overlapping instances error with single instance

[GHC]

#15800: Overlapping instances error with single instance
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        Reporter:  roland            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"09481a708caad699b65712dedd321cbbc19851a7/ghc"
 09481a70/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="09481a708caad699b65712dedd321cbbc19851a7"
 Improve documentation about overlapping instances

 An attempt to help with Trac #15800
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15800#comment:1>
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