Cleanup name handling in magic methods (php#13733)

The copy was introduced in bc59289, and later changed in 5752745,
to prevent indirect modifications of magic method arguments.
This is no longer necessary because we no longer deal with zvals, but
with string directly that the VM has retrieved either as a constant, or
via zval_try_get_tmp_string().

Author: nielsdos

Zend/zend_object_handlers.c

@@ -610,7 +610,6 @@ ZEND_API zval *zend_std_read_property(zend_object *zobj, zend_string *name, int
 	uintptr_t property_offset;
 	const zend_property_info *prop_info = NULL;
 	uint32_t *guard = NULL;
-	zend_string *tmp_name = NULL;
 
 #if DEBUG_OBJECT_HANDLERS
 	fprintf(stderr, "Read object #%d property: %s\n", zobj->handle, ZSTR_VAL(name));
@@ -692,9 +691,6 @@ ZEND_API zval *zend_std_read_property(zend_object *zobj, zend_string *name, int
 		guard = zend_get_property_guard(zobj, name);
 
 		if (!((*guard) & IN_ISSET)) {
-			if (!tmp_name && !ZSTR_IS_INTERNED(name)) {
-				tmp_name = zend_string_copy(name);
-			}
 			GC_ADDREF(zobj);
 			ZVAL_UNDEF(&tmp_result);
 
@@ -769,8 +765,6 @@ ZEND_API zval *zend_std_read_property(zend_object *zobj, zend_string *name, int
 	retval = &EG(uninitialized_zval);
 
 exit:
-	zend_tmp_string_release(tmp_name);
-
 	return retval;
 }
 /* }}} */
@@ -1822,7 +1816,6 @@ ZEND_API int zend_std_has_property(zend_object *zobj, zend_string *name, int has
 	zval *value = NULL;
 	uintptr_t property_offset;
 	const zend_property_info *prop_info = NULL;
-	zend_string *tmp_name = NULL;
 
 	property_offset = zend_get_property_offset(zobj->ce, name, 1, cache_slot, &prop_info);
 
@@ -1887,9 +1880,6 @@ ZEND_API int zend_std_has_property(zend_object *zobj, zend_string *name, int has
 			zval rv;
 
 			/* have issetter - try with it! */
-			if (!tmp_name && !ZSTR_IS_INTERNED(name)) {
-				tmp_name = zend_string_copy(name);
-			}
 			GC_ADDREF(zobj);
 			(*guard) |= IN_ISSET; /* prevent circular getting */
 			zend_std_call_issetter(zobj, name, &rv);
@@ -1912,7 +1902,6 @@ ZEND_API int zend_std_has_property(zend_object *zobj, zend_string *name, int has
 	}
 
 exit:
-	zend_tmp_string_release(tmp_name);
 	return result;
 }
 /* }}} */