Why zend_shutdown_constants not called from executor_globals_dtor?

Hi All, I could see in executor_globals_ctor calling zend_startup_constants which allocates one hash table. Later to free this hash table zend_shutdown_constants is called from zend_shutdown rather than executor_globals_dtor. This may not cause a memory leak in Non ZTS environment where zend_shutdown and executor_globals_dtor are called only once and the current free up by calling zend_shutdown_constants from zend_shutdown won't cause any memory leak. In case of ZTS environment every thread calls executor_globals_ctor and only the main thread causes zend_shutdown and hence only main thread EG(zend_constants) are freed whereas other threads EG(zend_constants) are not freed. Correct me if I am wrong. With regards Kamesh Jayachandran