[GHC] #10713: Type family not reducing over data family

[GHC]

#10713: Type family not reducing over data family
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        Reporter:  acowley           |                   Owner:  goldfire
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.8.4
  checker)                           |
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by Richard Eisenberg <eir@…>):

 In [changeset:"f063bd5413edf40f1b48e0f958410dcb6bf20b68/ghc"
 f063bd54/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f063bd5413edf40f1b48e0f958410dcb6bf20b68"
 Fix #10713.

 When doing the apartness/flattening thing, we really only need to
 eliminate non-generative tycons, not *all* families. (Data families
 are indeed generative!)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10713#comment:3>
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