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

[GHC]

#13083: Constraint solving failure with Coercible + type family + newtype
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        Reporter:  conal             |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:  Coercible
Operating System:  MacOS X           |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"7d2e5da61714025142f0085d5ae150a61e637a5e/ghc" 7d2e5da/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="7d2e5da61714025142f0085d5ae150a61e637a5e"
 Fix zonk_eq_types in TcCanonical

 This fixes Trac #13083. An egregious bug.

 Merge to the 8.0 branch
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13083#comment:5>
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