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
