bugfixed: cpool_node object pool must use lock

.gitignore

@@ -53,6 +53,7 @@ src/tests/test_atomic
 src/tests/test_file_write_hole
 src/tests/test_file_lock
 src/tests/test_thread_pool
+src/tests/test_data_visible
 
 # other
 *.swp

src/connection_pool.c

@@ -57,7 +57,7 @@ int conn_pool_init_ex1(ConnectionPool *cp, int connect_timeout,
     if ((result=fast_mblock_init_ex1(&cp->node_allocator, "cpool_node",
                     sizeof(ConnectionNode) + sizeof(ConnectionInfo) +
                     extra_data_size, init_capacity, alloc_elements_limit,
-                    NULL, NULL, false)) != 0)
+                    NULL, NULL, true)) != 0)
     {
         return result;
     }