4 files changed, 8 insertions, 6 deletions
diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index f1351f5a07..5819443d3c 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -2086,7 +2086,9 @@ void QObject::deleteLater()
 
 const char *qFlagLocation(const char *method)
 {
-    QThreadData::current()->flaggedSignatures.store(method);
+    QThreadData *currentThreadData = QThreadData::current(false);
+    if (currentThreadData != 0)
+        currentThreadData->flaggedSignatures.store(method);
     return method;
 }
 
diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index 8429e41433..fce84e881b 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -223,7 +223,7 @@ public:
     QThreadData(int initialRefCount = 1);
     ~QThreadData();
 
-    static QThreadData *current();
+    static QThreadData *current(bool createIfNecessary = true);
     static void clearCurrentThreadData();
     static QThreadData *get2(QThread *thread)
     { Q_ASSERT_X(thread != 0, "QThread", "internal error"); return thread->d_func()->data; }
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index 15558cb148..b838cb4b28 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -215,10 +215,10 @@ void QThreadData::clearCurrentThreadData()
     clear_thread_data();
 }
 
-QThreadData *QThreadData::current()
+QThreadData *QThreadData::current(bool createIfNecessary)
 {
     QThreadData *data = get_thread_data();
-    if (!data) {
+    if (!data && createIfNecessary) {
         data = new QThreadData;
         QT_TRY {
             set_thread_data(data);
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index 037343c996..865b1e6af5 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -101,11 +101,11 @@ void QThreadData::clearCurrentThreadData()
     TlsSetValue(qt_current_thread_data_tls_index, 0);
 }
 
-QThreadData *QThreadData::current()
+QThreadData *QThreadData::current(bool createIfNecessary)
 {
     qt_create_tls();
     QThreadData *threadData = reinterpret_cast<QThreadData *>(TlsGetValue(qt_current_thread_data_tls_index));
-    if (!threadData) {
+    if (!threadData && createIfNecessary) {
         threadData = new QThreadData;
         // This needs to be called prior to new AdoptedThread() to
         // avoid recursion.