我刚刚成功安装了rustc，然后看到apt建议我也得到了rust-doc。
$ sudo apt install rust-doc
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies.
rust-doc : Depends: fonts-open-sans but it is not installable
E: Unable to correct problems, you have held broken packages.
我想我的存储库中可能存在一些虚假的依赖关系。但我也特别关注最后一行：
您拿着破损的包裹。
我不确定这到底是什么意思。
由于我相信其中某些内容取决于我使用的存储库，因此请提供以下信息：
/etc/apt/sources.list:#deb cdrom:[Linux Mint 18.2 _Sonya_ - Release amd64 20170628]/ xenial contrib main non-free
/etc/apt/sources.list.d/maarten-baert-simplescreenrecorder-xenial.list:deb http://ppa.launchpad.net/maarten-baert/simplescreenrecorder/ubuntu xenial main
/etc/apt/sources.list.d/maarten-baert-simplescreenrecorder-xenial.list:deb-src http://ppa.launchpad.net/maarten-baert/simplescreenrecorder/ubuntu xenial main
/etc/apt/sources.list.d/official-package-repositories.list:# Do not edit this file manually, use Software Sources instead.
/etc/apt/sources.list.d/official-package-repositories.list:
/etc/apt/sources.list.d/official-package-repositories.list:deb http://packages.linuxmint.com sonya main upstream import backport #id:linuxmint_main
/etc/apt/sources.list.d/official-package-repositories.list:
/etc/apt/sources.list.d/official-package-repositories.list:deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
/etc/apt/sources.list.d/official-package-repositories.list:deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
/etc/apt/sources.list.d/official-package-repositories.list:deb http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
/etc/apt/sources.list.d/official-package-repositories.list:
/etc/apt/sources.list.d/official-package-repositories.list:deb http://security.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
/etc/apt/sources.list.d/official-package-repositories.list:deb http://archive.canonical.com/ubuntu/ xenial partner
/etc/apt/sources.list.d/vscode.list:### THIS FILE IS AUTOMATICALLY CONFIGURED ###
/etc/apt/sources.list.d/vscode.list:# You may comment out this entry, but any other modifications may be lost.
/etc/apt/sources.list.d/vscode.list:deb [arch=amd64] http://packages.microsoft.com/repos/vscode stable main
在回应David Postill的评论时，他建议我安装fonts-open-sans：
$ sudo apt-get install fonts-open-sans
[sudo] password for sam:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package fonts-open-sans is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'fonts-open-sans' has no installation candidate
1
“取决于：fonts-open-sans，但它不可安装”是您的提示。安装适当的字体。
—
DavidPostill
欢迎您，请添加您的sources.list的内容
—
-GAD3R
grep ^ /etc/apt/sources.list{,.d/*}
@ GAD3R我已经更新了帖子。
—
威尔逊
@Wilson fonts-open-sans？
—
DavidPostill
@DavidPostill没有安装候选程序；我更新了帖子
—
威尔逊