fix: validation should not fail on anonymous declarations (#13393)

* fix: validation should not fail on anonymous declarations

* feedback

Author: trueadm

.changeset/twelve-bears-worry.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: validation should not fail on anonymous declarations

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

@@ -8,7 +8,7 @@ import { validate_identifier_name } from './shared/utils.js';
  * @param {Context} context
  */
 export function ClassDeclaration(node, context) {
-	if (context.state.analysis.runes) {
+	if (context.state.analysis.runes && node.id !== null) {
 		validate_identifier_name(context.state.scope.get(node.id.name));
 	}
 

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

@@ -8,7 +8,7 @@ import { validate_identifier_name } from './shared/utils.js';
  * @param {Context} context
  */
 export function FunctionDeclaration(node, context) {
-	if (context.state.analysis.runes) {
+	if (context.state.analysis.runes && node.id !== null) {
 		validate_identifier_name(context.state.scope.get(node.id.name));
 	}
 

packages/svelte/tests/validator/samples/anonymous-declarations/class.svelte.js

@@ -0,0 +1 @@
+export default class {}

packages/svelte/tests/validator/samples/anonymous-declarations/errors.json

@@ -0,0 +1 @@
+[]

packages/svelte/tests/validator/samples/anonymous-declarations/function.svelte.js

@@ -0,0 +1 @@
+export default function () {}

packages/svelte/tests/validator/samples/anonymous-declarations/input.svelte

@@ -0,0 +1,4 @@
+<script>
+	import func from './function.svelte.js';
+	import klass from './class.svelte.js';
+</script>