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Ubuntu 20.04 上的 snap 刷新失败，并显示“断言存储损坏”

tag-icon • tag-icon 20.04 snap
Ubuntu 20.04 上的 snap 刷新失败，并显示“断言存储损坏”

我运行的是带有 regolith 桌面环境的 Ubuntu 20.04。我收到了更新操作系统的通知，并尝试使用“Snap Store”运行更新，但收到“无法更新软件包名称”的提示。

手动运行“snap refresh”会导致以下错误消息：

error: cannot refresh: cannot accept some assertions:

       - broken assertion storage, looking for snap-declaration: broken assertion storage, cannot decode assertion: assertion content/signature separator not found

此外，“快照列表”失败，原因如下：

error: cannot list local snaps! cannot find publisher details: broken assertion storage, looking
       for snap-declaration: broken assertion storage, cannot decode assertion: assertion
       content/signature separator not found

“systemctl status snapd.service” 似乎没问题：

● snapd.service - Snap Daemon
     Loaded: loaded (/lib/systemd/system/snapd.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2020-06-24 10:11:07 CEST; 54s ago
TriggeredBy: ● snapd.socket
   Main PID: 4471 (snapd)
      Tasks: 21 (limit: 16551)
     Memory: 20.9M
     CGroup: /system.slice/snapd.service
             └─4471 /usr/lib/snapd/snapd

Jun 24 10:11:07 stefan-thinkpad systemd[1]: Starting Snap Daemon...
Jun 24 10:11:07 stefan-thinkpad snapd[4471]: AppArmor status: apparmor is enabled and all features are available
Jun 24 10:11:07 stefan-thinkpad snapd[4471]: AppArmor status: apparmor is enabled and all features are available
Jun 24 10:11:07 stefan-thinkpad snapd[4471]: daemon.go:343: started snapd/2.45 (series 16; classic) ubuntu/20.04 (amd64) linux/5.4.0-37-generic.
Jun 24 10:11:07 stefan-thinkpad snapd[4471]: daemon.go:436: adjusting startup timeout by 1m40s (pessimistic estimate of 30s plus 5s per snap)
Jun 24 10:11:07 stefan-thinkpad systemd[1]: Started Snap Daemon.

知道是什么原因导致了这个问题吗？

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