[GHC] #15636: Implication constraint priority breaks default class implementations

[GHC]

#15636: Implication constraint priority breaks default class implementations
-------------------------------------+-------------------------------------
        Reporter:  i-am-tom          |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.6.1-beta1
      Resolution:  fixed             |             Keywords:
                                     |  QuantifiedConstraints
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:                    |
-------------------------------------+-------------------------------------
Changes (by i-am-tom):

 * status:  new => closed
 * resolution:   => fixed


-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15636#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler