fix: i'm a silly goose 🪿

packages/svelte/src/compiler/phases/2-analyze/visitors/ExpressionTag.js

@@ -22,7 +22,7 @@ export function ExpressionTag(node, context) {
 	 * the subtree as dynamic. This is because if it's inlinable it will be inlined in the template
 	 * directly making the whole thing actually static.
 	 */
-	if (attribute_parent && !is_inlinable_expression(node, context.state.scope)) {
+	if (!attribute_parent || !is_inlinable_expression(node, context.state.scope)) {
 		// TODO ideally we wouldn't do this here, we'd just do it on encountering
 		// an `Identifier` within the tag. But we currently need to handle `{42}` etc
 		mark_subtree_dynamic(context.path);