rune_invalid_arguments_length (#15516)

.changeset/two-spies-lie.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: throw rune_invalid_arguments_length when $state.raw() is used with more than 1 arg

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

@@ -117,7 +117,7 @@ export function CallExpression(node, context) {
 
 			if ((rune === '$derived' || rune === '$derived.by') && node.arguments.length !== 1) {
 				e.rune_invalid_arguments_length(node, rune, 'exactly one argument');
-			} else if (rune === '$state' && node.arguments.length > 1) {
+			} else if (node.arguments.length > 1) {
 				e.rune_invalid_arguments_length(node, rune, 'zero or one arguments');
 			}
 

packages/svelte/tests/compiler-errors/samples/runes-wrong-state-raw-args/_config.js

@@ -0,0 +1,8 @@
+import { test } from '../../test';
+
+export default test({
+	error: {
+		code: 'rune_invalid_arguments_length',
+		message: '`$state.raw` must be called with zero or one arguments'
+	}
+});

packages/svelte/tests/compiler-errors/samples/runes-wrong-state-raw-args/main.svelte

@@ -0,0 +1,3 @@
+<script>
+	const foo = $state.raw(1, 2, 3);
+</script>

packages/svelte/tests/compiler-errors/samples/runes-wrong-state-raw-args/main.svelte.js

@@ -0,0 +1 @@
+const foo = $state.raw(1, 2, 3);