structuredClone accepts boxed Symbols as empty objects

[OskarEichler]

Description

The React Native structuredClone polyfill correctly rejects primitive Symbols but treats boxed Symbols as arbitrary objects. structuredClone(Object(Symbol())) therefore returns {} instead of throwing, even though boxed Symbols are also not structured-cloneable.

Expected behavior

Boxed Symbols should throw DataCloneError, matching native structuredClone. The error path should not string-coerce the wrapper because Hermes throws a separate TypeError for that coercion.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

[react-native-bot]

Warning

Missing reproducer: We could not detect a reproducible example in your issue report. Reproducers are mandatory and we can accept only one of those as a valid reproducer:

• For majority of bugs: send us a Pull Request with the RNTesterPlayground.js edited to reproduce your bug.
• If your bug is UI related: a Snack
• If your bug is build/upgrade related: a project using our Reproducer Template

You can read more about about it on our website: How to report a bug.

[react-native-bot]

This issue is waiting for author's feedback since 24 days. Please provide the requested feedback or this will be closed in 7 days.