Custom Formatter Failed: Uncaught TypeError: Cannot convert a Symbol value to a string

[mikhail-ivanov-tr]

Description

When I enabled "Use Lightning Web Security for Lightning web components and Aura components" session setting, inspect in Chrome my LWC component, call $0 in Console tab of Devtools, and try to open the LWC object, I got an error message "Custom Formatter Failed: Uncaught TypeError: Cannot convert a Symbol value to a string". The same issue is not reproducible with Lightning Locker.

Also, the custom formatters don't work in LWS mode in all expected places, for example in Watch in Source tab of Devtools.

The exception is thrown in aura_proddebug.js in line 33019: ReflectApply$LWS(ArrayProtoSort$LWS, ownKeys$LWS, []);

Steps to Reproduce

My LWC:

<template>
	AAA
</template>

import {api, LightningElement} from 'lwc';

export default class Test extends LightningElement {
	@api val = ['ABC'];
}

Expected Results

Custom Formatters should show content instead of Proxy object.

Actual Results

Still Proxy objects are shown.

Browsers Affected

Chrome Version 116.0.5845.97 (Official Build) (64-bit)

[arcadeteddy]

FIX: salesforce/near-membrane#440

[mikhail-ivanov-tr]

Thank you for the fix. May I know when the fix will be rolled over to SF orgs?