Do not permit excessive recursion in component creation

Limit recursion during component creation to prevent infinite
recursion resulting in a crash.  Recursion results from invoking
createObject() in the Component.onCompleted handler.

Task-number: QTBUG-25439
Change-Id: Ica2ba099d82b5747c938501af04e67f7ace8402e
Reviewed-by: Michael Brasser <michael.brasser@nokia.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmlcomponent/data/recursionContinuation.qml b/tests/auto/qml/qqmlcomponent/data/recursionContinuation.qml
new file mode 100644
index 0000000000..a10afd3ebe
--- /dev/null
+++ b/tests/auto/qml/qqmlcomponent/data/recursionContinuation.qml
@@ -0,0 +1,16 @@
+import QtQuick 2.0
+
+Item {
+    id: root
+
+    property bool success: false
+
+    Component.onCompleted: {
+        for (var i = 0; i < 10; ++i) {
+            Qt.createComponent("RecursiveComponent.qml").createObject(root)
+        }
+
+        var o = Qt.createComponent("TestComponent.qml").createObject(root)
+        root.success = (o != null)
+    }
+}