Re: reproducible core dump in Qt::Table

Le Mardi 23 Mars 2004 02:02, Marc Horowitz a écrit :
> System: Debian/x86
>
> Package versions:
>
> ii  libperl5.8     5.8.3-2        Shared Perl library.
> ii  libqt-perl     3.008-1        Perl bindings for the Qt library
>
> The simplest way to reproduce this is to use pqtsh.  When I run the
> following commands:
>
>     use Qt::attributes qw(table);
>     table = Qt::Table();
>     table->show;
>     table->setNumRows(1);
>     table->setNumCols(1);
>     table->setText(0,0,"hello");
>     table->removeRow(0);
>
> the final command causes a segmentation fault.  valgrind strongly
> indicates that this is a double-free bug (logs appended).
> Interestingly, if I keep running (which is possible only under
> valgrind), I don't see the problem again.

OK, I can reproduce with CVS as well. No wonder.
Could you please file a report on sourceforge with the same content?

>
> Is there any other way for me to remove rows from a table using
> PerlQt?

yes but it's more convoluted.
You need to table->takeItem( table->item(x,y) )

Obviouly, the garbage collection model for *Items is unsatisfying. Qt isn't 
sound enough in that respect  to come up with something reliable.
That needs to be worked out, 
but I'm concerned about backward compatibility ;-/

G.