[GHC] #15632: Undependable Dependencies

[GHC]

#15632: Undependable Dependencies
-------------------------------------+-------------------------------------
        Reporter:  AntC              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.6.1-beta1
      Resolution:                    |             Keywords:
                                     |  FunctionalDependencies,
                                     |  OverlappingInstances
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  10675, 9210,      |  Differential Rev(s):
  8634, 15135, 15927, 9627, 16070,   |
  16241                              |
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by AntC):

 * related:  10675, 9210, 8634, 15135, 15927, 9627, 16070 => 10675, 9210,
     8634, 15135, 15927, 9627, 16070, 16241


Comment:

 Linking #16241, which is a follow-on from #15135.

 Under separate compilation, `OVERLAPPABLE` gives better coherence than
 `OVERLAPPING`. But it's fragile.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15632#comment:9>
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