This looks similar to https://bugs.documentfoundation.org/show_bug.cgi?id=131083, which the reporter could originally trigger fairly reliably, but ended up marking resolved because after installing updates the crash went away for them.
The steps to reproduce were to simply open libreoffice calc, use the mouse to create a vertical selection of two or more consecutive cells, and then click the cross in the window decorations to close calc. This would trigger the crash at least once in every ten runs, according to the reporter. I tested this a good number of times in a fully up-to-date Kubuntu 20.04 amd64 VM, without triggering any crash. According to the crash report on errors.ubuntu.com, the crash is still being reported on a daily basis with libreoffice 1:6.4.6-0ubuntu0.20.04.1. ** Bug watch added: Document Foundation Bugzilla #131083 https://bugs.documentfoundation.org/show_bug.cgi?id=131083 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice in Ubuntu. https://bugs.launchpad.net/bugs/1897784 Title: /usr/lib/libreoffice/program/soffice.bin:11:ScSelectionTransferObj::~ScSelectionTransferObj:ScSelectionTransferObj::~ScSelectionTransferObj:com::sun::star::uno::Reference:Qt5MimeData::~Qt5MimeData:Qt5MimeData::~Qt5MimeData Status in LibreOffice: New Status in libreoffice package in Ubuntu: Triaged Status in libreoffice source package in Focal: Triaged Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding libreoffice. This problem was most recently seen with package version 1:6.4.6-0ubuntu0.20.04.1, the problem page at https://errors.ubuntu.com/problem/cfc41540ed80c870e8fb93c32ad7df0b7391f1b7 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/. To manage notifications about this bug go to: https://bugs.launchpad.net/df-libreoffice/+bug/1897784/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp