[GHC] #6018: Injective type families

[GHC]

#6018: Injective type families
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        Reporter:  lunaris           |                   Owner:  jstolarek
            Type:  feature request   |                  Status:  closed
        Priority:  normal            |               Milestone:  8.0.1
       Component:  Compiler          |                 Version:  7.4.1
      Resolution:  fixed             |                Keywords:
                                     |  TypeFamilies, Injective
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:  T6018,
                                     |  T6018fail, T6018rnfail, T6018th,
                                     |  T6018failclosed1, T6018failclosed2,
                                     |  T6018failclosed3, T6018failclosed4,
                                     |  T6018failclosed5, T6018failclosed6,
                                     |  T6018failclosed7, T6018failclosed8,
                                     |  T6018failclosed9,
                                     |  T6018failclosed10,
                                     |  T6018failclosed11,
                                     |  T6018failclosed12, T6018ghci,
                                     |  T6018ghcifail, T6018ghcirnfail
      Blocked By:                    |                Blocking:
 Related Tickets:  #4259, #10832,    |  Differential Revisions:  Phab:D202
  #10833                             |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"a7f690972629672510c71149d7d7c6ffe6217201/ghc" a7f6909/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a7f690972629672510c71149d7d7c6ffe6217201"
 A CFunEqCan can be Derived

 This fixes the ASSERTION failures in
   indexed-types/should_fail/T5439
   typecheck/should_fail/T5490
 when GHC is compiled with -DDEBUG

 See Phab:D202 attached to Trac #6018
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6018#comment:115>
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