diff --git a/src/corelib/thread/qthreadpool.cpp b/src/corelib/thread/qthreadpool.cpp index 6d258af9df0..4aebbcc8cb7 100644 --- a/src/corelib/thread/qthreadpool.cpp +++ b/src/corelib/thread/qthreadpool.cpp @@ -756,6 +756,7 @@ bool QThreadPool::contains(const QThread *thread) const const QThreadPoolThread *poolThread = qobject_cast(thread); if (!poolThread) return false; + QMutexLocker locker(&d->mutex); return d->allThreads.contains(const_cast(poolThread)); }