Re: [Vala] object leak in async and closure

[Luca Bruno <lethalman88 gmail com>]

Please report a bug at bugzilla.gnome.org .
So, using "o" in the lambda seems to be the problem.


On Sat, Jan 4, 2014 at 7:39 PM, Michele Dionisio <michele dionisio gmail com
> wrote:

> Hi, I'm new in this mailing list and quite new in vala programming.
>
> I have a big software that somethime leak objct. Now I have replicate the
> issue with a small code:
>
>
> ############################################################################
>     class Pippo: Object {
>         public async void foo () {
>             Object o = new Object ();
>             stdout.printf("out-- %u\n",o.ref_count);
>             stdout.printf("this -- %u\n",this.ref_count);
>
>             SourceFunc f = () => {
>                 stdout.printf("infunc-- %u\n",o.ref_count);
>                 stdout.printf("in this -- %u\n",this.ref_count);
>                 //this.unref();
>                 stdout.printf("in this -- %u\n",this.ref_count);
>                 stdout.printf("end function f\n");
>                 return false;
>             };
>             GLib.Idle.add( (owned) f );
>
>             stdout.printf("end function foo\n");
>         }
>
>         ~Pippo() {
>             stdout.printf("destroy pippo\n");
>         }
>     }
>
>     void main() {
>         Pippo ? tmp = new Pippo();
>
>         tmp.foo.begin();
>
>         MainLoop loop = new MainLoop ();
>
>         GLib.Timeout.add(1000, () => {stdout.printf("timeout1\n"); tmp =
> null; return false;});
>
>         GLib.Timeout.add(2000, () => {stdout.printf("timeout2\n");
> loop.quit(); return false;});
>
>
>         loop.run ();
> }
>
>
> ############################################################################
>
> If in the function
> SourceFunc f
>
> there is any reference to any variable of foo or to any object of this we
> have the reference counting of this increase.
>
> and so after timeout1 the object tmp is not destroy. (And there is no
> reference on it)
>
> The only way to fix the issue is to manually decrease the reference of
> this. But this is a big workaraound.
>
> Someone have any idea where is my fault or if there is a bug in vala
> itself?
>
> regards
> _______________________________________________
> vala-list mailing list
> vala-list gnome org
> https://mail.gnome.org/mailman/listinfo/vala-list



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