在Ubuntu MATE 18.04 (Bionic Beaver) 上，我为 LibreOffice 使用以下 PPA：
$ inxi -r | grep libreoffice
Active apt sources in file: /etc/apt/sources.list.d/libreoffice-ubuntu-ppa-bionic.list
deb http://ppa.launchpad.net/libreoffice/ppa/ubuntu bionic main
今天我尝试将 LibreOffice 从 6.3.5~rc2-0ubuntu0.18.04.1~lo1 升级到 6.4.2-0ubuntu0.18.04.2 并且升级完成时出现错误：
$ sudo apt update
...
$ sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be REMOVED:
uno-libs3
The following NEW packages will be installed:
libjuh-java libjurt-java libridl-java libuno-cppu3 libuno-cppuhelpergcc3-3 libuno-purpenvhelpergcc3-3 libuno-sal3
libuno-salhelpergcc3-3 libunoil-java libunoloader-java …