I updated a 32-bit Devuan Jessie system today (Saturday) to Ascii. After
rebooting I needed to fix a few package dependency problems and I got
the following message when using aptitude to update.

sudo aptitude -y update

Get: 1 http://packages.devuan.org/merged ascii InRelease [113 kB]
Err http://packages.devuan.org/merged ascii InRelease
Couldn't create temporary file /tmp/apt.conf.0TEdzn for passing config
to apt-key
Fetched 113 kB in 9s (12.2 kB/s)
W: GPG error: http://packages.devuan.org/merged ascii InRelease:
Couldn't create temporary file /tmp/apt.conf.0TEdzn for passing config
to apt-key
E: The repository 'http://packages.devuan.org/merged ascii InRelease' is
not signed.
E: Failed to download some files
W: Failed to fetch
http://packages.devuan.org/merged/dists/ascii/InRelease: Couldn't create
temporary file /tmp/apt.conf.0TEdzn for passing config to apt-key
E: Some index files failed to download. They have been ignored, or old
ones used instead.

I use tmpfs for /tmp and it was set at 100MB. I get the same error with
a 500MB tmpfs. Is this a problem related to the ascii repository problem
earlier this week or is it a signing fault?