[GHC] #13083: Constraint solving failure with Coercible + type family + newtype

[GHC]

#13083: Constraint solving failure with Coercible + type family + newtype
-------------------------------------+-------------------------------------
        Reporter:  conal             |                Owner:  goldfire
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.0.3
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:  Coercible
Operating System:  MacOS X           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  typecheck/should_compile/T13083
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * status:  new => merge
 * testcase:   => typecheck/should_compile/T13083
 * milestone:   => 8.0.3


Comment:

 Richard: pls check.

 Merge to 8.0 branch

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13083#comment:6>
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