[GHC] #10675: GHC does not check the functional dependency consistency condition correctly

[GHC]

#10675: GHC does not check the functional dependency consistency condition
correctly
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.1
      Resolution:                    |             Keywords:  FunDeps
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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Comment (by rwbarton):

 Well let's please not continue using the word "undecidable" to have
 anything to do with the coverage conditions. I can't imagine it was
 originally anything but an oversight to have `UndecidableInstances`
 completely disable the coverage conditions. `UndecidableInstances` is
 supposed to be just about termination of instance search.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10675#comment:18>
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