GraphiteEditor/Graphite · critical

Regular Polygon can't be found

Error message

Regular Polygon can't be found

What it means

Polygon::create_node resolves the regular-polygon generator via DefinitionIdentifier::ProtoNode(graphene_std::vector::generator_nodes::regular_polygon::IDENTIFIER) and resolve_document_node_type(...).expect("Regular Polygon can't be found") (polygon_shape.rs:111). The resolver is a static HashMap lookup in DOCUMENT_NODE_TYPES (document_node_definitions.rs:130/1484); None means the Regular Polygon node is unregistered, and the expect panics the first time the Polygon tool creates a layer.

Source

Thrown at editor/src/messages/tool/common_functionality/shapes/polygon_shape.rs:111

			return Some(MouseCursorIcon::Default);
		}

		None
	}

	fn cleanup(&mut self) {
		self.number_of_points_dial.cleanup();
		self.point_radius_handle.cleanup();
	}
}

#[derive(Default)]
pub struct Polygon;

impl Polygon {
	pub fn create_node(vertices: u32) -> NodeTemplate {
		let identifier = DefinitionIdentifier::ProtoNode(graphene_std::vector::generator_nodes::regular_polygon::IDENTIFIER);
		let node_type = resolve_document_node_type(&identifier).expect("Regular Polygon can't be found");
		node_type.node_template_input_override([None, Some(NodeInput::value(TaggedValue::U32(vertices), false)), Some(NodeInput::value(TaggedValue::F64(0.5), false))])
	}

	pub fn update_shape(
		document: &DocumentMessageHandler,
		ipp: &InputPreprocessorMessageHandler,
		viewport: &ViewportMessageHandler,
		layer: LayerNodeIdentifier,
		shape_tool_data: &mut ShapeToolData,
		modifier: ShapeToolModifierKey,
		responses: &mut VecDeque<Message>,
	) {
		let [center, lock_ratio, _] = modifier;

		if let Some([start, end]) = shape_tool_data.data.calculate_points(document, ipp, viewport, center, lock_ratio) {
			// TODO: We need to determine how to allow the polygon node to make irregular shapes
			update_radius_sign(end, start, layer, document, responses);

View on GitHub (pinned to c507b35645)

Solutions

1. Verify the regular_polygon identifier key exists in DOCUMENT_NODE_TYPES and matches the const byte-for-byte
2. Repair the drift and rebuild
3. Use let-else so the polygon tool degrades with a log instead of a panic
4. Add the identifier to the cross-tool registry test

Example fix

// before
let node_type = resolve_document_node_type(&identifier).expect("Regular Polygon can't be found");
// after
let Some(node_type) = resolve_document_node_type(&identifier) else {
	log::error!("Regular Polygon node definition missing from DOCUMENT_NODE_TYPES");
	return None;
};

assert!(
	document_node_definitions::resolve_document_node_type(&DefinitionIdentifier::ProtoNode(graphene_std::vector::generator_nodes::regular_polygon::IDENTIFIER)).is_some(),
	"Regular Polygon generator not registered"
);

When it happens

Trigger: Drawing with the Polygon tool when regular_polygon::IDENTIFIER has no DOCUMENT_NODE_TYPES entry — renamed implementation, removed node, or edited registration list.

Common situations: Refactors renaming the regular_polygon module; Graphite upgrades re-namespacing generator nodes; feature-gated builds excluding the polygon generator.

Related errors

• Solidify Stroke node should exist
• Merge node
• Node
• Boolean node does not exist
• Blend node does not exist

AI-assisted analysis of GraphiteEditor/Graphite@c507b35645 (2026-08-16). Data as JSON: /api/errors/a5498ad6465055cd. Report an issue: GitHub.