Merge pull request #4775 from martin-frbg/issue4770

Guard against invalid thread_status.queue

driver/others/blas_server.c

@@ -418,7 +418,7 @@ blas_queue_t *tscq;
 
       tscq = atomic_load_queue(&thread_status[cpu].queue);
 
-	while(!tscq) {
+	while(!tscq || tscq == 0x1) {
 	YIELDING;
 
 	if ((unsigned int)rpcc() - last_tick > thread_timeout) {