title: $:/changenotes/5.4.0/#9495
description: Protect cached array data from external mutation
release: 5.4.0
tags: $:/tags/ChangeNote
change-type: bugfix
change-category: internal
github-links: https://github.com/TiddlyWiki/TiddlyWiki5/pull/9495
github-contributors: yaisog

Functions returning cached tiddler lists now return shallow copies to prevent external code from inadvertently mutating the cache
