[GHC] #8155: Defaulting bug or unfortunate error message with closed type families

[GHC]

#8155: Defaulting bug or unfortunate error message with closed type families
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        Reporter:  nh2               |            Owner:
            Type:  bug               |           Status:  closed
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.6.3
      Resolution:  invalid           |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:ff3d07addf6af962c4d0e69d2ac02218643046d1/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ff3d07addf6af962c4d0e69d2ac02218643046d1"
 Improve TcSimplify.approximateWC, fixing Trac #8155

 See Note [ApproximateWC]
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8155#comment:4>
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