Culprit - zend_op_array *compile_filename(int type, zval *filename TSRMLS_DC)

====================PHP 5.1====================

ZEND_API void zend_destroy_file_handle(zend_file_handle *file_handle TSRMLS_DC)
{
	zend_llist_del_element(&CG(open_files), file_handle, (int (*)(void *, void *)) zend_compare_file_handles);
}

...

	retval = zend_compile_file(&file_handle, type TSRMLS_CC);
	if (retval && file_handle.handle.stream.handle) {
...
	}
	zend_destroy_file_handle(&file_handle TSRMLS_CC);

====================PHP 5.2 & 5.3====================

ZEND_API void zend_destroy_file_handle(zend_file_handle *file_handle TSRMLS_DC)
{
	zend_llist_del_element(&CG(open_files), file_handle, (int (*)(void *, void *)) zend_compare_file_handles);
	/* zend_file_handle_dtor() operates on the copy, so we have to NULLify the original here */
	file_handle->opened_path = NULL;
	if (file_handle->free_filename) {
		file_handle->filename = NULL;
	}
}
...

	retval = zend_compile_file(&file_handle, type TSRMLS_CC);
...
	zend_destroy_file_handle(&file_handle TSRMLS_CC);