Allow auto-generated node names in `PopupMenu::add_submenu_item`

1 files changed, 5 insertions, 1 deletions

diff --git a/scene/gui/popup_menu.cpp b/scene/gui/popup_menu.cpp
index 0cda27ec24..d6b8dd0202 100644
--- a/scene/gui/popup_menu.cpp
+++ b/scene/gui/popup_menu.cpp
@@ -1487,7 +1487,11 @@ void PopupMenu::add_icon_radio_check_shortcut(const Ref<Texture2D> &p_icon, cons
 }
 
 void PopupMenu::add_submenu_item(const String &p_label, const String &p_submenu, int p_id) {
-	ERR_FAIL_COND_MSG(p_submenu.validate_node_name() != p_submenu, "Invalid node name for submenu, the following characters are not allowed:\n" + String::get_invalid_node_name_characters());
+	String submenu_name_safe = p_submenu.replace("@", "_"); // Allow special characters for auto-generated names.
+	if (submenu_name_safe.validate_node_name() != submenu_name_safe) {
+		ERR_FAIL_MSG(vformat("Invalid node name '%s' for a submenu, the following characters are not allowed:\n%s", p_submenu, String::get_invalid_node_name_characters(true)));
+	}
+
 	Item item;
 	item.text = p_label;
 	item.xl_text = atr(p_label);