Fix nullptr handling in binding

Fixes: QTBUG-77027
Change-Id: I61d5a20329ffe95af810b89e338eee2bc10bfe04
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmlproperty/data/nullPropertyBinding.qml b/tests/auto/qml/qqmlproperty/data/nullPropertyBinding.qml
new file mode 100644
index 0000000000..4fffc7aead
--- /dev/null
+++ b/tests/auto/qml/qqmlproperty/data/nullPropertyBinding.qml
@@ -0,0 +1,22 @@
+import QtQuick 2.12
+
+Item {
+    id: root
+
+    width: 640
+    height: 480
+
+    property bool toggle: false
+    property Item bound
+    property string message: "defined"
+
+    readonly property Item item: root.toggle ? root : null
+
+    Binding { target: root; property: "bound"; value: item}
+
+    function tog() {
+        console.info(root.bound ? root.bound.message: "undefined")
+        root.toggle = !root.toggle
+        return 42;
+    }
+}