[Issue 6581] New: Yet another dtor/postblit problem?

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6581

           Summary: Yet another dtor/postblit problem?
           Product: D
           Version: D2
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: dmitry.olsh at gmail.com


--- Comment #0 from Dmitry Olshansky <dmitry.olsh at gmail.com> 2011-08-30 14:12:40 PDT ---
Test case creates a instance of nested struct, and prints ctor/postblit/dtor
activity + address of this. Reduced from upcoming regex module, where it's
causing segfaults but only with -inline (dumb luck?).

import std.stdio;
struct R
{
    this(int k)
    {
        writefln("R created %x", &this);
    }
    this(this){ writefln("R postblit %x", &this); }

    ~this(){  writefln("R destroyed %x", &this); }
}

struct S
{
    R _match;

    this( int separator)
    {
      _match = R(separator);
      writefln("S created %x", cast(void*)&this);
    }
    this(this)
    {
      writefln("S postblit %x", cast(void*)&this);
    }
    ~this()
    {
      writefln("S destroyed %x", cast(void*)&this);
    }
}

void split(int rx)
{
    auto spl = S(rx);
    writefln("**** Spl is at address %x", cast(void*)&spl);
}

void main(string[] argv)
{
    split(42);
}


The end result for me looks like this:

R created 18fdc0
R destroyed 18fdc4  // killed wrong guy or missing a postblit at 18fe08?
S created 18fe08
**** Spl is at address 18fe08
S destroyed 18fe08
R destroyed 18fe08 

Bottom line: dtor called twice, ctor called once and not a single postblit. 
Saldo is negative ...

That's on almost latest DMD (commit c5c8500a13f222935f00145c16dfbc2d32351b0f)

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