[GHC] #13909: Misleading error message when partially applying a data type with a visible quantifier in its kind

GHC ghc-devs at haskell.org
Fri Sep 15 13:58:30 UTC 2017


#13909: Misleading error message when partially applying a data type with a visible
quantifier in its kind
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:  fixed             |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  typecheck/should_fail/T13909
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * testcase:   => typecheck/should_fail/T13909
 * status:  new => closed
 * resolution:   => fixed
 * milestone:   => 8.4.1


Comment:

 As noted above, we can't really "fix" this any further without
 implementing support for impredicative types, so I consider this ticket to
 be resolved.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13909#comment:4>
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