[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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Changes (by bgamari):

 * status:  new => infoneeded


Comment:

 Simon, did this ever happen? It looks like most of the tests you list are
 okay,

 ||= test       =||= status =||
 || tc150        || ok       ||
 || tc194        || ok       ||
 || tcfail198    || ok       ||
 || tcfail174    || ok       ||
 || tcfail165    || ok       ||
 || tcfail145    || ok       ||
 || tcfail104    || ok       ||
 || tc211        || ok       ||
 || indexed-types/should_compile/T4120  || ok ||
 || simpl017     || ok       ||
 || boxy/Base1   || broken due to #4295 ||
 || boxy/Church1 || broken due to #4295 ||
 || boxy/Church2 || broken due to #1330 ||
 || boxy/PList1  || broken due to #4295 ||
 || boxy/PList2  || broken due to #4295 ||
 || boxy/SystemF || broken due to #4295 ||
 || boxy/boxy    || broken due to #4295 ||
 || boxy/Compose || ok ||
 || boxy/T2193   || ok ||

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4295#comment:26>
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