There is a new pull request by oreo639 against master on the void-packages repository

https://github.com/oreo639/void-packages xfce4-session
https://github.com/void-linux/void-packages/pull/43020

xfce4-session: fix use after free
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#### Testing the changes
- I tested the changes in this PR: **briefly**

People have been reporting use-after-free issues on other distros with the latest glib (due to it switching to using `malloc()`)

Try as I might, I can't reproduce any of those issues on Void with the latest glib, regardless, this backports patches from upstream that reportedly fix the issue.

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A patch file from https://github.com/void-linux/void-packages/pull/43020.patch is attached