Updated both my RPi2 and RPi4 and rebooted then could not ssh in to either of them. Did not check whether they failed to boot, or sshd was failed. Restored glib2 2.72.3-3 on both and they returned to normal.
Can't see what the changes are because, as I reported here 1 month ago, the View Changes link on all the package pages is broken (it used to work).