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digitalmars.D.bugs - [Issue 4712] New: Issue of destructor for temporary instance of structs

reply d-bugmail puremagic.com writes:
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 puremagic.com
        ReportedBy: zan77137 nifty.com


--- Comment #0 from SHOO <zan77137 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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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4712


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clugdbug yahoo.com.au


--- Comment #1 from Don <clugdbug yahoo.com.au> 2010-08-22 12:43:53 PDT ---
Is this the same as bug 3516? The fact that turning on the optimiser is not
mentioned there, and may indicate it's a different bug. But they seem to be
closely related.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
           Severity|normal                      |critical


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Sep 20 2010
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4712


SHOO <zan77137 nifty.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


--- Comment #2 from SHOO <zan77137 nifty.com> 2010-11-14 09:59:35 PST ---
This issue is already fixed.
(Because it was fixed before I knew it, I don't know revision clearly.)

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