account for attributes in opening tag

packages/svelte/src/compiler/phases/1-parse/state/element.js

@@ -95,8 +95,7 @@ export default function element(parser) {
 
 			if (parent.type === 'RegularElement') {
 				if (!parser.last_auto_closed_tag || parser.last_auto_closed_tag.tag !== name) {
-					const opening_tag_end =
+					const opening_tag_end = parent.fragment.nodes[0]?.start ?? start;
-						parent.fragment.nodes[0]?.start ?? parent.start + parent.name.length + 2;
 					w.element_implicitly_closed({ start: parent.start, end: opening_tag_end }, parent.name);
 				}
 			} else if (!parser.loose) {
@@ -192,8 +191,7 @@ export default function element(parser) {
 	parser.allow_whitespace();
 
 	if (parent.type === 'RegularElement' && closing_tag_omitted(parent.name, name)) {
-		const opening_tag_end =
+		const opening_tag_end = parent.fragment.nodes[0]?.start ?? start;
-			parent.fragment.nodes[0]?.start ?? parent.start + parent.name.length + 2;
 		w.element_implicitly_closed({ start: parent.start, end: opening_tag_end }, parent.name);
 		parent.end = start;
 		parser.pop();