`Evaluation.has_unknown`

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

@@ -2,7 +2,7 @@
 /** @import { Context } from '../types' */
 import { dev, is_ignored } from '../../../../state.js';
 import * as b from '#compiler/builders';
-import { get_rune, UNKNOWN } from '../../../scope.js';
+import { get_rune } from '../../../scope.js';
 import { transform_inspect_rune } from '../../utils.js';
 import { should_proxy } from '../utils.js';
 
@@ -83,7 +83,7 @@ export function CallExpression(node, context) {
 			node.callee.property.name
 		) &&
 		node.arguments.some(
-			(arg) => arg.type === 'SpreadElement' || context.state.scope.evaluate(arg).values.has(UNKNOWN)
+			(arg) => arg.type === 'SpreadElement' || context.state.scope.evaluate(arg).has_unknown
 		)
 	) {
 		return b.call(

packages/svelte/src/compiler/phases/scope.js

@@ -16,7 +16,7 @@ import { is_reserved, is_rune } from '../../utils.js';
 import { determine_slot } from '../utils/slot.js';
 import { validate_identifier_name } from './2-analyze/visitors/shared/utils.js';
 
-export const UNKNOWN = Symbol('unknown');
+const UNKNOWN = Symbol('unknown');
 /** Includes `BigInt` */
 const NUMBER = Symbol('number');
 const STRING = Symbol('string');
@@ -180,6 +180,13 @@ class Evaluation {
 	 */
 	is_known = true;
 
+	/**
+	 * True if the possible values contains `UNKNOWN`
+	 * @readonly
+	 * @type {boolean}
+	 */
+	has_unknown = false;
+
 	/**
 	 * True if the value is known to not be null/undefined
 	 * @readonly
@@ -540,6 +547,10 @@ class Evaluation {
 			if (value == null || value === UNKNOWN) {
 				this.is_defined = false;
 			}
+
+			if (value === UNKNOWN) {
+				this.has_unknown = true;
+			}
 		}
 
 		if (this.values.size > 1 || typeof this.value === 'symbol') {