[GHC] #4295: Review higher-rank and impredicative types

[GHC]

#4295: Review higher-rank and impredicative types
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        Reporter:  simonpj           |                Owner:  simonpj
            Type:  task              |               Status:  infoneeded
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  6.12.3
  checker)                           |
      Resolution:                    |             Keywords:
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 simonpj):

 No I have not looked at this for ages.  Impredicativity is simply not a
 supported feature at the moment.  If things are passing, then let them
 pass.  If you have to change expect_broken to pass, then put a comment in
 the .hs file to point to this ticket and say that it might be wobbly
 because of impredicativity.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4295#comment:27>
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