tweak

packages/svelte/src/compiler/phases/3-transform/server/transform-server.js

@@ -1444,19 +1444,14 @@ const template_visitors = {
 	},
 	SnippetBlock(node, context) {
 		// TODO hoist where possible
-		/** @type {import('estree').Pattern[]} */
-		const args = [b.id('$$payload')];
-		for (const arg of node.parameters) {
-			if (arg) args.push(arg);
-		}
-
 		context.state.init.push(
 			b.function_declaration(
 				node.expression,
-				args,
+				[b.id('$$payload'), ...node.parameters],
 				/** @type {import('estree').BlockStatement} */ (context.visit(node.body))
 			)
 		);
+
 		if (context.state.options.dev) {
 			context.state.init.push(b.stmt(b.call('$.add_snippet_symbol', node.expression)));
 		}

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

@@ -148,7 +148,7 @@ export interface DebugTag extends BaseNode {
 export interface RenderTag extends BaseNode {
 	type: 'RenderTag';
 	expression: Identifier;
-	arguments: (Expression | SpreadElement)[];
+	arguments: Array<Expression | SpreadElement>;
 }
 
 type Tag = ExpressionTag | HtmlTag | ConstTag | DebugTag | RenderTag;