QML: Check for stack overflows when creating objects

Fixes: QTBUG-106875
Change-Id: I3b0abda6948b79a9e3cf263f27885037fff1804c
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
(cherry picked from commit edc01fbfa430d6f0ce66f1871ab28e0f691ee252)

2 files changed, 18 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickloader/data/overflow.qml b/tests/auto/quick/qquickloader/data/overflow.qml
new file mode 100644
index 0000000000..8ca196e2ed
--- /dev/null
+++ b/tests/auto/quick/qquickloader/data/overflow.qml
@@ -0,0 +1,5 @@
+import QtQuick 2.15
+
+Loader {
+    source: "overflow.qml"
+}
diff --git a/tests/auto/quick/qquickloader/tst_qquickloader.cpp b/tests/auto/quick/qquickloader/tst_qquickloader.cpp
index db678ae5a1..4539a89cb3 100644
--- a/tests/auto/quick/qquickloader/tst_qquickloader.cpp
+++ b/tests/auto/quick/qquickloader/tst_qquickloader.cpp
@@ -134,6 +134,8 @@ private slots:
     void setSourceAndCheckStatus();
     void asyncLoaderRace();
     void noEngine();
+
+    void stackOverflow();
 };
 
 Q_DECLARE_METATYPE(QList<QQmlError>)
@@ -1530,6 +1532,17 @@ void tst_QQuickLoader::noEngine()
     QTRY_COMPARE(o->property("changes").toInt(), 1);
 }
 
+void tst_QQuickLoader::stackOverflow()
+{
+    QQmlEngine engine;
+    const QUrl url = testFileUrl("overflow.qml");
+    QQmlComponent component(&engine, url);
+    QVERIFY2(component.isReady(), qPrintable(component.errorString()));
+    const QString message = url.toString() + QStringLiteral(": Maximum call stack size exceeded.");
+    QTest::ignoreMessage(QtCriticalMsg, qPrintable(message));
+    QScopedPointer<QObject> o(component.create());
+}
+
 QTEST_MAIN(tst_QQuickLoader)
 
 #include "tst_qquickloader.moc"