** Changed in: unattended-upgrades (Ubuntu)
       Status: New => Won't Fix

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  unattended-upgrade --help raises UnicodeEncodeError when stdout
  encoding is ascii

Status in apt package in Ubuntu:
  Fix Released
Status in unattended-upgrades package in Ubuntu:
  Won't Fix
Status in apt source package in Xenial:
Status in unattended-upgrades source package in Xenial:
Status in apt source package in Bionic:
Status in unattended-upgrades source package in Bionic:

Bug description:
  [Test Case]

  rbalint@yogi:~$ lxc launch ubuntu:18.04 bb-lp-1806076
  Creating bb-lp-1806076
  Starting bb-lp-1806076
  rbalint@yogi:~$ lxc shell bb-lp-1806076
  mesg: ttyname failed: No such device
  root@bb-lp-1806076:~# apt install -yqq language-pack-ru-base
  The following package was automatically installed and is no longer required:
  Use 'apt autoremove' to remove it.
  The following additional packages will be installed:
  The following NEW packages will be installed:
    language-pack-ru language-pack-ru-base
  0 upgraded, 2 newly installed, 0 to remove and 7 not upgraded.
  Need to get 2310 kB of archives.
  After this operation, 11.8 MB of additional disk space will be used.
  Selecting previously unselected package language-pack-ru-base.
  (Reading database ... 28536 files and directories currently installed.)
  Preparing to unpack .../language-pack-ru-base_1%3a18.04+20180712_all.deb ...
  Unpacking language-pack-ru-base (1:18.04+20180712) ...
  Selecting previously unselected package language-pack-ru.
  Preparing to unpack .../language-pack-ru_1%3a18.04+20180712_all.deb ...
  Unpacking language-pack-ru (1:18.04+20180712) ...
  Setting up language-pack-ru (1:18.04+20180712) ...
  Setting up language-pack-ru-base (1:18.04+20180712) ...
  Generating locales (this might take a while)...
    ru_RU.UTF-8... done
    ru_UA.UTF-8... done
  Generation complete.
  root@bb-lp-1806076:~# env LANG=ru_RU unattended-upgrade --help | cat
  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1983, in <module>
      (options, args) = parser.parse_args()  # type: ignore
    File "/usr/lib/python3.6/optparse.py", line 1387, in parse_args
      stop = self._process_args(largs, rargs, values)
    File "/usr/lib/python3.6/optparse.py", line 1427, in _process_args
      self._process_long_opt(rargs, values)
    File "/usr/lib/python3.6/optparse.py", line 1501, in _process_long_opt
      option.process(opt, value, values, self)
    File "/usr/lib/python3.6/optparse.py", line 785, in process
      self.action, self.dest, opt, value, values, parser)
    File "/usr/lib/python3.6/optparse.py", line 807, in take_action
    File "/usr/lib/python3.6/optparse.py", line 1647, in print_help
  UnicodeEncodeError: 'ascii' codec can't encode characters in position 
126-133: ordinal not in range(128)

  root@bb-lp-1806076:~# env LANG=ru_RU.UTF-8 unattended-upgrade --help | cat
  Usage: unattended-upgrade [options]

    -h, --help            show this help message and exit
    -d, --debug           print debug messages
    --apt-debug           make apt/libapt print verbose debug messages
    -v, --verbose         print info messages
    --dry-run             Simulation, download but do not install
    --download-only       Only download, do not even try to install.
                          Upgrade in minimal steps (and allow interrupting with

  [Original Bug Text]

  The Ubuntu Error Tracker has been receiving reports about a problem regarding 
unattended-upgrades.  This problem was most recently seen with package version 
1.1ubuntu1.18.04.6, the problem page at 
contains more details, including versions of packages affected, stacktrace or 
traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software 
developer, you can request it at http://forms.canonical.com/reports/.

  Also seen in:
   * https://errors.ubuntu.com/problem/936bb1c75c4efe018f968a5773b820bcf52c298a

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