[GHC] #13154: Standalone-derived anyclass instances aren't as permissive as empty instances

[GHC]

#13154: Standalone-derived anyclass instances aren't as permissive as empty
instances
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        Reporter:  RyanGlScott       |                Owner:  RyanGlScott
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4337,
       Wiki Page:                    |  Phab:D4370
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * differential:  Phab:D4337 => Phab:D4337, Phab:D4370


Comment:

 Phab:D4370 is another slight refactor that's working towards fixing this
 ticket.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13154#comment:15>
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