fixup! Support first-class callables in const-expressions

Author: TimWolla

Zend/zend_ast.c

@@ -1013,13 +1013,13 @@ ZEND_API zend_result ZEND_FASTCALL zend_ast_evaluate_inner(
 					zend_string *function_name = zend_ast_get_str(ast->child[0]);
 					zend_string *function_name_lc = zend_string_tolower(function_name);
 					fptr = zend_fetch_function(function_name_lc);
-					zend_string_release(function_name_lc);
 					if (!fptr && ast->child[0]->attr != ZEND_NAME_FQ) {
 						const char *backslash = zend_memrchr(ZSTR_VAL(function_name_lc), '\\', ZSTR_LEN(function_name_lc));
 						if (backslash) {
 							fptr = zend_fetch_function_str(backslash + 1, ZSTR_LEN(function_name_lc) - (backslash - ZSTR_VAL(function_name_lc) + 1));
 						}
 					}
+					zend_string_release(function_name_lc);
 					if (!fptr) {
 						zend_throw_error(NULL, "Call to undefined function %s()", ZSTR_VAL(function_name));
 						return FAILURE;