[GHC] #12803: Functional dependencies and type families

[GHC]

#12803: Functional dependencies and type families
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        Reporter:  simonpj           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"2cdd9bd5208e3ad78d7a3b8b82c8ae1be486b34d/ghc"
 2cdd9bd5/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="2cdd9bd5208e3ad78d7a3b8b82c8ae1be486b34d"
 Take account of injectivity when doing fundeps

 This fixes Trac #12803. Yikes!

 See Note [Care with type functions].
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12803#comment:2>
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