44902f09cf
Investigating QCocoaWindow::setVisible idempotence revealed that our QCocoaEventDispatcherPrivate::beginModalSession() implementation would happily add the same window multiple times, resulting in trying to re-start a modal session for the same window when the window was closed, confusing AppKit's logic for choosing the next key window when a modal window is closed. We now bail out if we detect this scenario, even if setVisible has been fixed. Additional logging has also been added. Pick-to: 6.5 Change-Id: I07418c12b421fb0b4ebf875050e32f56fdad6197 Reviewed-by: Doris Verria <doris.verria@qt.io> Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io> (cherry picked from commit 78cb91c5caa47d49a4105c1113edaf3a87827b98) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>