1 files changed, 21 insertions, 0 deletions
diff --git a/tests/auto/qml/qjsengine/tst_qjsengine.cpp b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
index c2c6f3f43f..8d2b5179f8 100644
--- a/tests/auto/qml/qjsengine/tst_qjsengine.cpp
+++ b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
@@ -293,6 +293,7 @@ private slots:
     void spreadNoOverflow();
 
     void deleteDefineCycle();
+    void deleteFromSparseArray();
 
 public:
     Q_INVOKABLE QJSValue throwingCppMethod1();
@@ -5837,6 +5838,26 @@ void tst_QJSEngine::deleteDefineCycle()
   QVERIFY(stackTrace.isEmpty());
 }
 
+void tst_QJSEngine::deleteFromSparseArray()
+{
+    QJSEngine engine;
+
+    // Should not crash
+    const QJSValue result = engine.evaluate(QLatin1String(R"((function() {
+        let o = [];
+        o[10000] = 10;
+        o[20000] = 20;
+        for (let k in o)
+            delete o[k];
+        return o;
+    })())"));
+
+    QVERIFY(result.isArray());
+    QCOMPARE(result.property("length").toNumber(), 20001);
+    QVERIFY(result.property(10000).isUndefined());
+    QVERIFY(result.property(20000).isUndefined());
+}
+
 QTEST_MAIN(tst_QJSEngine)
 
 #include "tst_qjsengine.moc"