4 files changed, 17 insertions, 10 deletions
diff --git a/src/corelib/kernel/qeventdispatcher_symbian.cpp b/src/corelib/kernel/qeventdispatcher_symbian.cpp
index 1d7be79..191be6c 100644
--- a/src/corelib/kernel/qeventdispatcher_symbian.cpp
+++ b/src/corelib/kernel/qeventdispatcher_symbian.cpp
@@ -733,7 +733,7 @@ bool QEventDispatcherSymbian::processEvents ( QEventLoop::ProcessEventsFlags fla
             }
 
             TInt error;
-            handledSymbianEvent = CActiveScheduler::RunIfReady(error, CActive::EPriorityIdle);
+            handledSymbianEvent = CActiveScheduler::RunIfReady(error, KMinTInt);
             if (error) {
                 qWarning("CActiveScheduler::RunIfReady() returned error: %i\n", error);
                 CActiveScheduler::Current()->Error(error);
diff --git a/src/corelib/kernel/qmetaobject.cpp b/src/corelib/kernel/qmetaobject.cpp
index ecffe99..312c4b2 100644
--- a/src/corelib/kernel/qmetaobject.cpp
+++ b/src/corelib/kernel/qmetaobject.cpp
@@ -974,7 +974,7 @@ QByteArray QMetaObject::normalizedType(const char *type)
     if (!type || !*type)
         return result;
 
-    QVarLengthArray<char> stackbuf(int(strlen(type)) + 1);
+    QVarLengthArray<char> stackbuf(qstrlen(type) + 1);
     qRemoveWhitespace(type, stackbuf.data());
     int templdepth = 0;
     qNormalizeType(stackbuf.data(), templdepth, result);
diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 8e4ec7c..389e6e7 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -3279,12 +3279,14 @@ void QMetaObject::activate(QObject *sender, const QMetaObject *m, int local_sign
 
             const int method = c->method;
             QObjectPrivate::Sender currentSender;
-            currentSender.sender = sender;
-            currentSender.signal = signal_absolute_index;
-            currentSender.ref = 1;
+            const bool receiverInSameThread = currentThreadData == receiver->d_func()->threadData;
             QObjectPrivate::Sender *previousSender = 0;
-            if (currentThreadData == receiver->d_func()->threadData)
+            if (receiverInSameThread) {
+                currentSender.sender = sender;
+                currentSender.signal = signal_absolute_index;
+                currentSender.ref = 1;
                 previousSender = QObjectPrivate::setCurrentSender(receiver, &currentSender);
+            }
             locker.unlock();
 
             if (qt_signal_spy_callback_set.slot_begin_callback != 0) {
@@ -3300,8 +3302,8 @@ void QMetaObject::activate(QObject *sender, const QMetaObject *m, int local_sign
                 metacall(receiver, QMetaObject::InvokeMetaMethod, method, argv ? argv : empty_argv);
             } QT_CATCH(...) {
                 locker.relock();
-
-                QObjectPrivate::resetCurrentSender(receiver, &currentSender, previousSender);
+                if (receiverInSameThread)
+                    QObjectPrivate::resetCurrentSender(receiver, &currentSender, previousSender);
 
                 --connectionLists->inUse;
                 Q_ASSERT(connectionLists->inUse >= 0);
@@ -3316,7 +3318,8 @@ void QMetaObject::activate(QObject *sender, const QMetaObject *m, int local_sign
 
             locker.relock();
 
-            QObjectPrivate::resetCurrentSender(receiver, &currentSender, previousSender);
+            if (receiverInSameThread)
+                QObjectPrivate::resetCurrentSender(receiver, &currentSender, previousSender);
 
             if (connectionLists->orphaned)
                 break;
diff --git a/src/corelib/kernel/qvariant.cpp b/src/corelib/kernel/qvariant.cpp
index 227a60d..07c9e53 100644
--- a/src/corelib/kernel/qvariant.cpp
+++ b/src/corelib/kernel/qvariant.cpp
@@ -484,9 +484,13 @@ static bool compare(const QVariant::Private *a, const QVariant::Private *b)
      * QMetaType::VoidStar, QMetaType::QObjectStar and so forth, is that it wouldn't include
      * user defined pointer types. */
     const char *const typeName = QMetaType::typeName(a->type);
-    if (typeName[qstrlen(typeName) - 1] == '*')
+    uint typeNameLen = qstrlen(typeName);
+    if (typeNameLen > 0 && typeName[typeNameLen - 1] == '*')
         return *static_cast<void *const *>(a_ptr) == *static_cast<void *const *>(b_ptr);
 
+    if (a->is_null && b->is_null)
+        return true;
+
     return a_ptr == b_ptr;
 }