--- qemu-1.4.0/bsd-user/syscall.c.orig
+++ qemu-1.4.0/bsd-user/syscall.c
@@ -2418,7 +2418,7 @@ do_thr_exit(CPUArchState *cpu_env, abi_u
 		}
 
 		thread_env = NULL;
-		object_delete(OBJECT(ENV_GET_CPU(cpu_env)));
+		object_unref(OBJECT(ENV_GET_CPU(cpu_env)));
 		g_free(ts);
 		pthread_exit(NULL);
 	}