The following error message is from the conffile function in
DistUpgradeViewNonInteractive.py
2018-10-04 14:20:29,580 ERROR error 'a bytes-like object is required,
not 'str'' when trying to write to the conffile
** Changed in: ubuntu-release-upgrader (Ubuntu)
Status: Confirmed => Triaged
** Changed in: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1796193
Title:
unattended do-release-upgrade asks about /etc/cron.daily/apt-compat
Status in apt package in Ubuntu:
Confirmed
Status in ubuntu-release-upgrader package in Ubuntu:
Triaged
Bug description:
I'm trying to do some automated testing that involved upgrading a
system from xenial to bionic, so I need it to not ask for user input.
Before running do-release-upgrade, the system got a fresh dist-upgrade
and reboot.
To avoid interactive responses, I'm using:
$ sudo do-release-upgrade -d -f DistUpgradeViewNonInteractive
Part way through the upgrade, I do get prompted for something though:
Preparing to unpack .../apt_1.6.3ubuntu0.1_amd64.deb ...
Unpacking apt (1.6.3ubuntu0.1) over (1.2.27) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
/sbin/ldconfig.real: Warning: ignoring configuration file that cannot
be opened: /etc/ld.so.conf.d/x86_64-linux-gnu_EGL.conf: No such file
or directory
/sbin/ldconfig.real: Warning: ignoring configuration file that cannot
be opened: /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf: No such file or
directory
Setting up apt (1.6.3ubuntu0.1) ...
Installing new version of config file /etc/apt/apt.conf.d/01autoremove
...
Configuration file '/etc/cron.daily/apt-compat'
==> Deleted (by you or by a script) since installation.
==> Package distributor has shipped an updated version.
What would you like to do about it ? Your options are:
Y or I : install the package maintainer's version
N or O : keep your currently-installed version
D : show the differences between the versions
Z : start a shell to examine the situation
The default action is to keep your current version.
Comparing the sha1 of apt-compat before the upgrade to another xenial
system that has been unmodified, they are the same:
In /var/log/dist-upgrade/main.log, I also found this:
2018-10-04 14:20:24,575 WARNING got a conffile-prompt from dpkg for file:
'/etc/cron.daily/apt-compat'
2018-10-04 14:20:29,580 ERROR error 'a bytes-like object is required, not
'str'' when trying to write to the conffile
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