[Issue 4606] New: access modifier causes failure to find stack pointer for template delegate

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4606

           Summary: access modifier causes failure to find stack pointer
                    for template delegate
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Mac OS X
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: andy at aligature.com


--- Comment #0 from andy at aligature.com 2010-08-09 09:40:36 PDT ---
I encountered a problem while trying to change the less template parameter of
the setIntersection function in std.algorithm.  I finally distilled the problem
down to a simple example.

<code>
#!/usr/bin/env rdmd

import std.stdio;

struct Test(alias less)
{
public:
   void doit()
   {
      less(1, 2);
   }
}

void main()
{
   int x = 5;
   auto f = delegate bool(int a, int b){ writefln("%s %s %s", x, a, b); return
a < b; };

   auto d = Test!(f)();
   d.doit();
}
</code>

In this case, I should see output of "5 1 2", but instead I get a runtime
error:

./test.d(10): Error: function test.main.Test!(f).Test.doit cannot access frame
of function main
./test.d(19): Error: template instance test.main.Test!(f) error instantiating

If I remove the unneeded "public:" access modifier, the test works as expected.
 I'm using dmd v2.047 for Mac OS X downloaded from digitalmars.com.

This seems related to the post from Andrei to the d-announce mailing list back
in 07-Mar-2009
(http://www.mail-archive.com/digitalmars-d-announce@puremagic.com/msg01332.html).

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