JavaScript: Make "this" available in blocks inside arrow functions

Fixes: QTBUG-98039
Pick-to: 6.2 6.3
Change-Id: I51ff36994fa0f3f3568c8114cb6841f677f64bc4
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/qml/qjsengine/tst_qjsengine.cpp b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
index b08a638fd7..a92141a1e5 100644
--- a/tests/auto/qml/qjsengine/tst_qjsengine.cpp
+++ b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
@@ -279,6 +279,7 @@ private slots:
 
     void uiLanguage();
     void urlObject();
+    void thisInConstructor();
 
 public:
     Q_INVOKABLE QJSValue throwingCppMethod1();
@@ -5473,6 +5474,27 @@ void tst_QJSEngine::urlObject()
     QCOMPARE(result2, url);
 }
 
+void tst_QJSEngine::thisInConstructor()
+{
+    QJSEngine engine;
+    const QJSValue result = engine.evaluate(R"((function() {
+        let a = undefined;
+        class Bugtest {
+            constructor() {
+                (() => {
+                    if (true) {
+                        a = this;
+                    }
+                })();
+            }
+        };
+        new Bugtest();
+        return a;
+    })())");
+    QVERIFY(!result.isUndefined());
+    QVERIFY(result.isObject());
+}
+
 QTEST_MAIN(tst_QJSEngine)
 
 #include "tst_qjsengine.moc"