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packages/svelte/src/compiler/phases/2-analyze/index.js

@@ -746,8 +746,7 @@ export function analyze_component(root, source, options) {
 					);
 					if (
 						is_custom_element_node(element) &&
-						element.attributes.length === 1 &&
-						element.metadata.path
+						element.attributes.length === 1
 					) {
 						mark_subtree_dynamic(element.metadata.path);
 					}

packages/svelte/src/compiler/types/template.d.ts

@@ -303,7 +303,7 @@ export namespace AST {
 			/** `true` if contains a SpreadAttribute */
 			has_spread: boolean;
 			scoped: boolean;
-			path?: SvelteNode[];
+			path: SvelteNode[];
 		};
 	}