[Issue 4712] New: Issue of destructor for temporary instance of structs

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4712

           Summary: Issue of destructor for temporary instance of structs
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: zan77137 at nifty.com


--- Comment #0 from SHOO <zan77137 at nifty.com> 2010-08-22 06:29:06 PDT ---
This code doesn't work!

import std.stdio;

auto func(int A = int.init)()
{
    struct XXX
    {
        int a;
        ~this(){ writeln("dtor"); }
    }
    return XXX();
}
void main()
{
    writeln("start");
    {
        auto x = func!();
    }
    writeln("end");
}


result:

start
dtor
end
object.Error: Access Violation


If I remove the destructor, it runs correctly.
Or I set -O switch to compiler, it runs correctly, too.
Workaround for this bug is making dummy constructor:

import std.stdio;

auto func(int A = int.init)()
{
    struct XXX
    {
        int a;
        this(int aa){ a = aa; writeln("ctor"); }
        ~this(){ writeln("dtor"); }
    }
    return XXX(A);
}
void main()
{
    writeln("start");
    {
        auto x = func!();
    }
    writeln("end");
}

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