Am Samstag, den 11.09.2010, 00:14 +0200 schrieb Pavel Sanda:
> Uwe Stöhr wrote:
> > Am 10.09.2010 20:49, schrieb Pavel Sanda:
> >
> >> do you understand why the code in r35299
> >>
> >> string width_str = fromqstr(WidthLE->text());
> >> if (width_str[0] == '-')
> >> width_str.erase(0,1);
> >>
> >> must crash sooner or later?
> >
> > No. I check if the string begins with a '-' sign and if so, I remove this
> > character from the string because I want to turn it into a positive one
> > without casting the string to a float and then back to a string. This works
> > well here and doesn't crash.
> > But as you know I'm a miserable programmer and it seems I have overseen
> > something.
>
> the problem is what happens when width_str is empty. then no width_str[0]
> exists and accessing it is asking for crash.
>
> pavel
if (WidthLE->text().startsWith('-')) {
Peter
