We cannot go from member function pointer to method index for slots (we
can for signals), so using string-based syntax to connect and PMF-syntax
to disconnect doesn't work, and vice versa.
Document this in a (partially failing) test, and add a warning to the
relevant QObject::disconnect documentation.
Task-number: QTBUG-126580
Task-number: QTBUG-126581
Change-Id: I4b17662aa9aa7b624049c5b0a3b046ed35230f05
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 27a3229626249a100d8e6fa495927715aba6963d)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
f715325932