Comment 7 for bug 1855259

My system was installed using the LVM with full-disk encryption option of the alternative installer, and uses the default ext4 filesystem, so the filesystem doesn't appear to the problem.

I previously reported that I didn't have the problem on a system with a very similar software setup, but without the nvidia-driver-435 package installed. However, I did unexpectedly encounter a very similar error on that machine yesterday when installing the youtube-dl package. apt failed during install of the package. Fortunately, this time, it was fixable. Running the `apt update` and `apt full-upgrade` was sufficient to sort it out.

This should be marked as important and as a security issue, because I haven't had any security updates (well, any updates!) in a week now because of it.