[GHC] #15177: Faulty instance termination check, with PolyKinds and/or TypeInType

[GHC]

#15177: Faulty instance termination check, with PolyKinds and/or TypeInType
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  Instances
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 goldfire):

 Perhaps it would be too confusing, but we could conceivably run ''both''
 checks. If either check passes, then the instance terminates, as we've
 found a decreasing metric.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15177#comment:6>
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