[GHC] #9433: Partially applied type family allowed but unusable

[GHC]

#9433: Partially applied type family allowed but unusable
-------------------------------------+-------------------------------------
              Reporter:  hesselink   |            Owner:
                  Type:  bug         |           Status:  merge
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
  (Type checker)                     |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  GHC         |  Related Tickets:
  accepts invalid program            |
             Test Case:  indexed-    |
  types/should_fail/T9433            |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * status:  new => merge
 * testcase:   => indexed-types/should_fail/T9433


Comment:

 Thanks for reporting this.

 Austin: worth merging `ee4501` if we make 7.8.4

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9433#comment:3>
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