[GHC] #5529: Newtypes with hidden constructors cannot be passed as FFI arguments

[GHC]

#5529: Newtypes with hidden constructors cannot be passed as FFI arguments
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    Reporter:  mikhail.vorozhtsov  |        Owner:              
        Type:  bug                 |       Status:  new         
    Priority:  normal              |    Milestone:              
   Component:  Compiler            |      Version:  7.3         
    Keywords:                      |     Testcase:              
   Blockedby:                      |   Difficulty:              
          Os:  Unknown/Multiple    |     Blocking:              
Architecture:  Unknown/Multiple    |      Failure:  None/Unknown
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Comment(by igloo@…):

 commit fb83cd0239e6d50b0ef0ad5cd9b641f0b4df032c
 {{{
 Author: Ian Lynagh <igloo at earth.li>
 Date:   Fri Oct 21 00:47:15 2011 +0100

     Finish fixing #5529: Require that constructors are imported from all
 types

     We used to have a hack for Foreign.C.Types and System.Posix.Types,
     but I've removed that now. We also mark any constructors that we look
     through as "used", so that we don't get warnings about unused imports.

  compiler/typecheck/TcForeign.lhs |   28 ++++++++++++++++++++++------
  compiler/utils/Outputable.lhs    |    5 +++++
  2 files changed, 27 insertions(+), 6 deletions(-)
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5529#comment:14>
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