[GHC] #11409: Cannot instantiate literals using TypeApplications

[GHC]

#11409: Cannot instantiate literals using TypeApplications
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        Reporter:  Feuerbach         |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1-rc1
      Resolution:                    |             Keywords:
                                     |  TypeApplications
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11352            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by adamgundry):

 * cc: adamgundry (added)
 * related:   => #11352


Comment:

 See also #11352, which is about the same issue for the newfangled
 overloaded labels (and I guess overloaded string and rational literals
 should be treated similarly). I experimented with something like Simon's
 suggestion for overloaded labels, and found that error messages got worse,
 because it was no longer possible to give a `CtOrigin` that mentioned the
 overloaded label as the source. But perhaps there's a way round that?

 Alternatively, I suppose we could add a special rule for typechecking a
 literal applied to a type.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11409#comment:4>
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