[GHC] #13305: static: check for identifiers should only consider term level variables

[GHC]

#13305: static: check for identifiers should only consider term level variables
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        Reporter:  edsko             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
                                     |  StaticPointers
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by edsko):

 > I'm surprised that is accepted, and I am no longer sure of what the
 specification is, or how it is implemented. (E.g. if you wrote Num a
 instead of, or as well as, Typeable a it would not work.)

 This is because the `Typeable` comes from `static` itself; we can have
 polymorphic static values (but they must be `Typeable`); we do not support
 adhoc polymorphism (and workaround this all the time using `Dict`s).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13305#comment:8>
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