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  1. Qt
  2. QTBUG-95134

crash in QAccessibleWidget::window() function with NULL pointer

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Details

    • Bug
    • Resolution: Unresolved
    • P1: Critical
    • None
    • 5.15.2
    • GUI: Accessibility (a11y), Widgets: Widgets and Dialogs
    • None
    • windows 10 professional 21H1
      OS inner version 19043.1083
      Qt 5.15.2 msvc2019_64
    • Windows

    Description

      result: 

      QWindow *QAccessibleWidget::window() const
{
    const QWidget *w = widget();
    Q_ASSERT(w);
    QWindow *result = w->windowHandle();
    if (!result) {
        if (const QWidget *nativeParent = w->nativeParentWidget())
            result = nativeParent->windowHandle();
    }
    return result;
}

      this code crash, in release mode assert no effect, but 'w' is NULL .

       

      scene descript:

      When i click a "Qml Button" , i need to create and show  a QWidget dialog.

      QWidget dialog has some QLabel on .ui files, construct Dialog will call setupUI,

      lead to call retranslateUi,  QLabel::setText, then call 

      QAccessible::updateAccessibility with  "NameChanged" QAccessibleEvent,

      then QAccessibleWidget crash.

       

      here is call stack

       

       

       

      Attachments

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-95135 QLabel::setText lead to QAccessibleWidget crash

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-95135 QLabel::setText lead to QAccessibleWidget crash

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-115161 Crash in QAccessibleComboBox::focusChild()

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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            People

              smd Jan Arve
              jaredtao jared tao
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              Dates

                Created:
                Updated:

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