Comment 8 for bug 1988754

Matt K committed a patch related to this issue.
It has been pushed to "master":

https://git.libreoffice.org/core/commit/05889c7fd814187aec3d88c056ece0cc33736868

tdf#149499 Prevent crash upon inserting page break and undoing

It will be available in 24.8.0.

The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
https://wiki.documentfoundation.org/Testing_Daily_Builds

Affected users are encouraged to test the fix and report feedback.