[GHC] #10079: Coercible solver regression: Couldn't match rep of () with Const () b

[GHC]

#10079: Coercible solver regression: Couldn't match rep of () with Const () b
-------------------------------------+-------------------------------------
        Reporter:  glguy             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.10.1
       Component:  Compiler (Type    |                 Version:  7.10.1-rc1
  checker)                           |                Keywords:
      Resolution:                    |            Architecture:
Operating System:  Unknown/Multiple  |  Unknown/Multiple
 Type of failure:  GHC rejects       |               Test Case:  indexed-
  valid program                      |  types/should_compile/T10079
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D653
-------------------------------------+-------------------------------------
Changes (by goldfire):

 * owner:  goldfire =>
 * priority:  highest => high
 * differential:   => Phab:D653
 * resolution:  fixed =>
 * status:  closed => new


Comment:

 Sadly, Simon's comment:9 exposes some serious flaws in my approach here.
 Work in progress on the solution is at Phab:D653. (Happily, that solution
 will also fix #7788 and #8550.)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10079#comment:13>
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