当我从 19.04 升级到 19.10 时，有一个包无法更新emacs-lucid。
当我尝试立即升级它时，出现错误：
dpkg: warning: old emacs-lucid package pre-removal script subprocess returned error exit status 127
当我尝试通过 Ubuntu 软件安装或删除软件时，出现以下信息：
E: The package emacs-lucid needs to be reinstalled, but I can't find an archive for it.
E: Internal error opening cache (1). Please report.
安装 Synaptics 后，第二个错误消息开始出现。我尝试告诉它不要升级emacs-lucid，但现在我无法更新任何内容。
输出为apt-cache policy emacs-lucid：
emacs-lucid:
Installed: 1:26.1+1-3.2ubuntu2
Candidate: 1:26.3+1-1ubuntu1
Version table:
1:26.3+1-1ubuntu1 500
500 http://ca.archive.ubuntu.com/ubuntu eoan/universe amd64 Packages
*** 1:26.1+1-3.2ubuntu2 100
100 /var/lib/dpkg/status)
运行后sudo apt-get install emacs-lucid=1:26.1+1-3.2ubuntu2我得到：
The following information may help resolve the situation:
The following packages have unmet dependencies:
emacs-lucid : Depends: emacs-bin-common (= 1:26.1+1-3.2ubuntu2) but 1:26.3+1-1ubuntu1 is to be installed
Depends: emacs-common (= 1:26.1+1-3.2ubuntu2) but 1:26.3+1-1ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.
运行后apt-cache policy emacs-bin-common emacs-common我得到：
Installed: 1:26.3+1-1ubuntu1
Candidate: 1:26.3+1-1ubuntu1
Version table:
*** 1:26.3+1-1ubuntu1 500
500 http://ca.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
100 /var/lib/dpkg/status
emacs-common:
Installed: 1:26.3+1-1ubuntu1
Candidate: 1:26.3+1-1ubuntu1
Version table:
*** 1:26.3+1-1ubuntu1 500
500 http://ca.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
500 http://ca.archive.ubuntu.com/ubuntu eoan/main i386 Packages
100 /var/lib/dpkg/status