Merge remote-tracking branch 'origin/5.12' into 5.13

Change-Id: I552629813ea8100d04ea19e51fe7198931082e19

4 files changed, 9 insertions, 6 deletions

diff --git a/src/qml/jsruntime/qv4engine.cpp b/src/qml/jsruntime/qv4engine.cpp
index 4c5e124cb0..8057119064 100644
--- a/src/qml/jsruntime/qv4engine.cpp
+++ b/src/qml/jsruntime/qv4engine.cpp
@@ -172,7 +172,7 @@ ExecutionEngine::ExecutionEngine(QJSEngine *jsEngine)
         bool ok = false;
         maxCallDepth = qEnvironmentVariableIntValue("QV4_MAX_CALL_DEPTH", &ok);
         if (!ok || maxCallDepth <= 0) {
-#ifdef QT_NO_DEBUG
+#if defined(QT_NO_DEBUG) && !defined(__SANITIZE_ADDRESS__)
             maxCallDepth = 1234;
 #else
             // no (tail call) optimization is done, so there'll be a lot mare stack frames active
diff --git a/src/qml/jsruntime/qv4qobjectwrapper.cpp b/src/qml/jsruntime/qv4qobjectwrapper.cpp
index 5467e730e3..6fed538fa8 100644
--- a/src/qml/jsruntime/qv4qobjectwrapper.cpp
+++ b/src/qml/jsruntime/qv4qobjectwrapper.cpp
@@ -565,9 +565,9 @@ void QObjectWrapper::setProperty(ExecutionEngine *engine, QObject *object, QQmlP
 
         QQmlContextData *callingQmlContext = scope.engine->callingQmlContext();
         if (!QQmlPropertyPrivate::write(object, *property, v, callingQmlContext)) {
-            const char *valueType = nullptr;
-            if (v.userType() == QVariant::Invalid) valueType = "null";
-            else valueType = QMetaType::typeName(v.userType());
+            const char *valueType = (v.userType() == QMetaType::UnknownType)
+                    ? "an unknown type"
+                    : QMetaType::typeName(v.userType());
 
             const char *targetTypeName = QMetaType::typeName(property->propType());
             if (!targetTypeName)
diff --git a/src/qml/qml/qqmlmetatype.cpp b/src/qml/qml/qqmlmetatype.cpp
index b21c3ec40d..83196f4577 100644
--- a/src/qml/qml/qqmlmetatype.cpp
+++ b/src/qml/qml/qqmlmetatype.cpp
@@ -2589,6 +2589,10 @@ void QQmlMetaType::freeUnusedTypesAndCaches()
     QMutexLocker lock(metaTypeDataLock());
     QQmlMetaTypeData *data = metaTypeData();
 
+    // in case this is being called during program exit, `data` might be destructed already
+    if (!data)
+        return;
+
     {
         bool deletedAtLeastOneType;
         do {
diff --git a/src/qml/qml/qqmltypewrapper.cpp b/src/qml/qml/qqmltypewrapper.cpp
index 246de04316..24c5aecc00 100644
--- a/src/qml/qml/qqmltypewrapper.cpp
+++ b/src/qml/qml/qqmltypewrapper.cpp
@@ -97,9 +97,8 @@ QObject* QQmlTypeWrapper::singletonObject() const
 
 QVariant QQmlTypeWrapper::toVariant() const
 {
-    // Only Singleton type wrappers can be converted to a variant.
     if (!isSingleton())
-        return QVariant();
+        return QVariant::fromValue<QObject *>(d()->object);
 
     QQmlEngine *e = engine()->qmlEngine();
     QQmlType::SingletonInstanceInfo *siinfo = d()->type().singletonInstanceInfo();