1Mutex still locked at thread exit: mutex 0x........, recursion count 1, owner 3. 2 at 0x........: pthread_join (drd_pthread_intercepts.c:?) 3 by 0x........: main (tc22_exit_w_lock.c:43) 4mutex 0x........ was first observed at: 5 at 0x........: pthread_mutex_lock (drd_pthread_intercepts.c:?) 6 by 0x........: child_fn1 (tc22_exit_w_lock.c:18) 7 by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?) 8 9