Bug#812857: unattended-upgrades: non ascii characters in dpkg log file crashes unattended upgrades

[Rudy Gevaert]

Package: unattended-upgrades
Version: 0.83.3
Severity: important
Tags: l10n

Dear Maintainer,

I noticed that with the last security updates the package crashes because the 
dpkg log file contains non ascci chars

Traceback (most recent call last):
  File \"/usr/bin/unattended-upgrade\", line 1321, in <module>
    main(options)
  File \"/usr/bin/unattended-upgrade\", line 1266, in main
    log_content = get_dpkg_log_content(logfile_dpkg, install_start_time)
  File \"/usr/bin/unattended-upgrade\", line 1017, in get_dpkg_log_content
    for line in fp.readlines():
  File \"/usr/lib/python3.4/encodings/ascii.py\", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 726: 
ordinal not in range(128)

The exit code is 1.

These are the relevant lines:

Adding debian:TÜRKTRUST_Elektronik_Sertifika_Hizmet_Sağlayıcısı_H5.pem
Adding debian:TÜRKTRUST_Elektronik_Sertifika_Hizmet_Sağlayıcısı_H6.pem
Removing debian:E-Guven_Kok_Elektronik_Sertifika_Hizmet_Saglayicisi.pem

I also attached the file.

-- System Information:
Debian Release: 8.3
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=locale: Cannot set 
LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages unattended-upgrades depends on:
ii  apt                    1.0.9.8.2
ii  apt-utils              1.0.9.8.2
ii  debconf [debconf-2.0]  1.5.56
ii  init-system-helpers    1.22
ii  lsb-base               4.1+Debian13+nmu1
ii  lsb-release            4.1+Debian13+nmu1
ii  python3                3.4.2-2
ii  python3-apt            0.9.3.12
ii  ucf                    3.0030
ii  xz-utils               5.1.1alpha+20120614-2+b3

unattended-upgrades recommends no packages.

Versions of packages unattended-upgrades suggests:
ii  bsd-mailx                       8.1.2-0.20141216cvs-2
ii  postfix [mail-transport-agent]  2.11.3-1

-- Configuration Files:
/etc/apt/apt.conf.d/50unattended-upgrades changed [not included]

-- debconf information excluded

Adding debian:TÜRKTRUST_Elektronik_Sertifika_Hizmet_Sağlayıcısı_H5.pem
Adding debian:TÜRKTRUST_Elektronik_Sertifika_Hizmet_Sağlayıcısı_H6.pem
Removing debian:E-Guven_Kok_Elektronik_Sertifika_Hizmet_Saglayicisi.pem