Application crashes on QAbstractButton::setChecked if button destroyed in toggled signal

https://github.com/qt/qtbase/blob/5.15/src/widgets/widgets/qabstractbutton.cpp : 689

There is no check for quard before call to QAccessible::updateAccessibility(&event);

If a button is destroyed in emitToggled() application craches in QAccessibleEvent::accessibleInterface(), because
QAccessibleStateChangeEvent::m_object is invalid.

In attached example application crashes in 4 seconds after button pressed