There's a merged pull request on the void-packages repository

qt5-webengine: apply upstream backported nullptr patch
https://github.com/void-linux/void-packages/pull/25949

Description:
Refs qutebrowser/qutebrowser#5721, applies upstream patch https://codereview.qt-project.org/c/qt/qtwebengine-chromium/+/315691 which resolves renderer crashes in some WebRTC flows (it's especially bad in video calls, eg. Hangouts and Jitsi, where I routinely drop off the call by way of tab crashes every few minutes).