[Qt-interest] QLineEdit::clear() crash

[Francisco Gonzalez]

Hi,


> void le1_changed(const QStrig& v) {
>    le2->clear(); // CRASH HERE
>    le2->setEnabled(validate_le1());
> }
>
> The crash happens somewhere inside the clear() call marked with "CRASH
> HERE" above.  However, it only happens after the first QLineEdit widget
> has already had text put into it and then one of the QComboBox widgets
> before it is changed.
> Any ideas?

Check if le2 is a valid pointer.
You can use QPointer for this:
     QPointer<QLineEdit> le2 = new QLineEdit(parent);

     ...
     if (le2)
         le2->clear();
     else
         qDebug() << "Some text";

Hope this will help,
Francisco