[GHC] #9840: Permit empty closed type families

[GHC]

#9840: Permit empty closed type families
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        Reporter:  adamgundry        |                   Owner:
            Type:  feature request   |                  Status:  closed
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler (Type    |                 Version:  7.8.3
  checker)                           |                Keywords:
      Resolution:  fixed             |            Architecture:
Operating System:  Unknown/Multiple  |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:  indexed-
      Blocked By:                    |  types/should_compile/T9840
 Related Tickets:  #8028             |                Blocking:
                                     |  Differential Revisions:  Phab:D841
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Changes (by adamgundry):

 * status:  merge => closed
 * resolution:   => fixed
 * milestone:   => 7.12.1


Comment:

 On reflection, I agree, let's leave this in HEAD but not merge into 7.10.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9840#comment:12>
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