Protect tab focus chain from infinite loops when item is invisible

Make sure to start the search for a potential focus item on an item that
will be visited again later, otherwise we'll loop for ever.

Fixes: QTBUG-68271
Change-Id: Icb330e4e726132511810027a33b9fb346c7fa131
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickitem2/data/activeFocusOnTab_infiniteLoop.qml b/tests/auto/quick/qquickitem2/data/activeFocusOnTab_infiniteLoop.qml
new file mode 100644
index 0000000000..889e480f3b
--- /dev/null
+++ b/tests/auto/quick/qquickitem2/data/activeFocusOnTab_infiniteLoop.qml
@@ -0,0 +1,13 @@
+import QtQuick 2.6
+
+Item {
+    visible: true
+    Item {
+        visible: false
+        Item {
+            objectName: "hiddenChild"
+            activeFocusOnTab: true
+            focus: true
+        }
+    }
+}