fix: don't try to add owners to non-`$state` class fields (#14533)

* fix: don't try to add owners to non-`$state` class fields

`$state.raw` and `$derived(.by)` will not have a state symbol on them, potentially causing a disastrous amount of traversal to potentially not find any state symbol. So it's better to not traverse them.

Potentially someone could create a `$state` while creating `$state.raw` or inside a `$derived.by`, but that feels so much of an edge case that it doesn't warrant a perf hit for the common case.

Fixes #14491

* for bind:, too

.changeset/giant-windows-dance.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: don't try to add owners to non-`$state` class fields

packages/svelte/src/compiler/phases/3-transform/client/visitors/ClassBody.js

@@ -184,7 +184,12 @@ export function ClassBody(node, context) {
 				'method',
 				b.id('$.ADD_OWNER'),
 				[b.id('owner')],
-				Array.from(public_state.keys()).map((name) =>
+				Array.from(public_state)
+					// Only run ownership addition on $state fields.
+					// Theoretically someone could create a `$state` while creating `$state.raw` or inside a `$derived.by`,
+					// but that feels so much of an edge case that it doesn't warrant a perf hit for the common case.
+					.filter(([_, { kind }]) => kind === 'state')
+					.map(([name]) =>
 						b.stmt(
 							b.call(
 								'$.add_owner',

packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js

@@ -2,7 +2,7 @@
 /** @import { AST, TemplateNode } from '#compiler' */
 /** @import { ComponentContext } from '../../types.js' */
 import { dev, is_ignored } from '../../../../../state.js';
-import { get_attribute_chunks } from '../../../../../utils/ast.js';
+import { get_attribute_chunks, object } from '../../../../../utils/ast.js';
 import * as b from '../../../../../utils/builders.js';
 import { create_derived } from '../../utils.js';
 import { build_bind_this, validate_binding } from '../shared/utils.js';
@@ -176,6 +176,15 @@ export function build_component(node, component_name, context, anchor = context.
 				bind_this = attribute.expression;
 			} else {
 				if (dev) {
+					const left = object(attribute.expression);
+					let binding;
+					if (left?.type === 'Identifier') {
+						binding = context.state.scope.get(left.name);
+					}
+					// Only run ownership addition on $state fields.
+					// Theoretically someone could create a `$state` while creating `$state.raw` or inside a `$derived.by`,
+					// but that feels so much of an edge case that it doesn't warrant a perf hit for the common case.
+					if (binding?.kind !== 'derived' && binding?.kind !== 'raw_state') {
 						binding_initializers.push(
 							b.stmt(
 								b.call(
@@ -187,6 +196,7 @@ export function build_component(node, component_name, context, anchor = context.
 							)
 						);
 					}
+				}
 
 				const is_store_sub =
 					attribute.expression.type === 'Identifier' &&