[GHC] #10570: Terrible error message with fundeps and PolyKinds

[GHC]

#10570: Terrible error message with fundeps and PolyKinds
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        Reporter:  danilo2           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"2d06a9f19d5b3ab8c3ff0b24f508c15bedae99d2/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="2d06a9f19d5b3ab8c3ff0b24f508c15bedae99d2"
 Improve error message for fundeps

 Improve error message fundeps, especially when PolyKinds means that
 the un-determined variables are (invisible) kind variables.

 See Trac #10570.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10570#comment:5>
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