[GHC] #8428: Incorrect type formatting in error messages

[GHC]

#8428: Incorrect type formatting in error messages
-------------------------------------+-------------------------------------
        Reporter:  klao              |            Owner:  monoidal
            Type:  bug               |           Status:  closed
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.6.3
      Resolution:  fixed             |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Easy (less than 1
       Test Case:                    |  hour)
  typecheck/should_fail/T8428        |       Blocked By:
        Blocking:                    |  Related Tickets:
-------------------------------------+-------------------------------------
Changes (by monoidal):

 * status:  patch => closed
 * testcase:   => typecheck/should_fail/T8428
 * resolution:   => fixed


Comment:

 Looks good, I've pushed it. Thanks for the patch.

 The type `(forall s. ST s)` should be rejected as a kind error, because
 under the forall there should be a type of kind *, not * -> * or similar.
 However, we currently do not detect this (#8388).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8428#comment:5>
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