https mirrors apport-retrace crashed with SystemError in _get_primary_mirror_from_apt_sources(): cannot determine default mirror: /etc/apt/sources.list does not contain a valid deb line

[Bryan Quigley]

1. Have other crash occur.
2. Click retrace locally.
3. apport-retrace crashes.

The only thing I can think is it's the fact that i changed my mirror to:
deb https://mirrors.ocf.berkeley.edu/ubuntu/ disco main restricted universe multiverse
deb-src https://mirrors.ocf.berkeley.edu/ubuntu/ disco main restricted universe multiverse

ProblemType: Crash
DistroRelease: Ubuntu 19.04
Package: apport-retrace 2.20.10-0ubuntu23
ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
Uname: Linux 5.0.0-8-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportLog:
 ERROR: apport (pid 10677) Mon Apr 1 19:40:34 2019: called for pid 8661, signal 11, core limit 0, dump mode 1
 ERROR: apport (pid 10677) Mon Apr 1 19:40:34 2019: executable: /usr/bin/gedit (command line "/usr/bin/gedit --gapplication-service")
 ERROR: apport (pid 10677) Mon Apr 1 19:40:34 2019: debug: session gdbus call: (true,)

 ERROR: apport (pid 10677) Mon Apr 1 19:40:42 2019: wrote report /var/crash/_usr_bin_gedit.1000.crash
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
CrashReports:
 640:1000:117:8118520:2019-04-01 20:06:04.204469680 -0700:2019-04-01 20:06:05.204469680 -0700:/var/crash/_usr_bin_gedit.1000.crash
 640:1000:117:23602:2019-04-01 20:06:21.172740697 -0700:2019-04-01 20:06:22.172740697 -0700:/var/crash/_usr_bin_apport-retrace.1000.crash
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 1 20:06:22 2019
ExecutablePath: /usr/bin/apport-retrace
InstallationDate: Installed on 2018-04-14 (352 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180414)
InterpreterPath: /usr/bin/python3.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/apport-retrace -S system -C /home/username/.cache/apport/retrace -v --output /var/crash/_usr_bin_gedit.1000.crash /var/crash/_usr_bin_gedit.1000.crash
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/bin/python3.7, Python 3.7.3, python3-minimal, 3.7.2-1
PythonArgs: ['/usr/bin/apport-retrace', '-S', 'system', '-C', '/home/username/.cache/apport/retrace', '-v', '--output', '/var/crash/_usr_bin_gedit.1000.crash', '/var/crash/_usr_bin_gedit.1000.crash']
PythonDetails: /usr/bin/python2.7, Python 2.7.16, python-minimal, 2.7.16-1
SourcePackage: apport
Title: apport-retrace crashed with SystemError in _get_primary_mirror_from_apt_sources(): cannot determine default mirror: /etc/apt/sources.list does not contain a valid deb line
UpgradeStatus: Upgraded to disco on 2019-01-05 (86 days ago)
UserGroups: adm cdrom dip libvirt lpadmin lxd plugdev sambashare sudo

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

Please provide your full /etc/apt/sources.list file so I can see what's going on. Thanks in advance!

[Bryan Quigley (bryanquigley)]

Sources was:
deb https://mirrors.rit.edu/ubuntu/ focal main restricted universe multiverse
deb-src https://mirrors.rit.edu/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.rit.edu/ubuntu/ focal-updates main restricted universe multiverse
deb-src https://mirrors.rit.edu/ubuntu/ focal-updates main restricted universe multiverse
deb https://mirrors.rit.edu/ubuntu/ focal-security main restricted universe multiverse
deb-src https://mirrors.rit.edu/ubuntu/ focal-security main restricted universe multiverse

but I haven't reproduced this in over a year, so I'm going to close it.

[Heinrich Schuchardt (xypron)]

My sources.list file has this first deb line:

deb [ arch=riscv64 ] http://ports.ubuntu.com/ubuntu-ports/ lunar main restricted

root@unmatched2:/var/crash# apport-retrace --gdb --sandbox system --cache ~/.cache/apport-retrace/ _usr_bin_qemu-x86_64-static.1000.crash
Traceback (most recent call last):
  File "/usr/bin/apport-retrace", line 743, in <module>
    main()
  File "/usr/bin/apport-retrace", line 487, in main
    sandbox, cache, outdated_msg = apport.sandboxutils.make_sandbox(
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/apport/sandboxutils.py", line 277, in make_sandbox
    pkg = packaging.get_file_package(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/apport/packaging_impl/apt_dpkg.py", line 536, in get_file_package
    return self._search_contents(file, map_cachedir, release, arch)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/apport/packaging_impl/apt_dpkg.py", line 1478, in _search_contents
    self._get_mirror(),
    ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/apport/packaging_impl/apt_dpkg.py", line 1426, in _get_mirror
    self._mirror = self._get_primary_mirror_from_apt_sources(
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/apport/packaging_impl/apt_dpkg.py", line 1414, in _get_primary_mirror_from_apt_sources
    raise SystemError(
SystemError: cannot determine default mirror: /etc/apt/sources.list does not contain a valid deb line
root@unmatched2:/var/crash#

[Heinrich Schuchardt (xypron)]

Splitting above sources.list line results in:
['deb', '[', 'arch=riscv64', ']', 'http://ports.ubuntu.com/ubuntu-ports/', 'lunar', 'main', 'restricted']

Method _get_primary_mirror_from_apt_sources() incorrectly assumes that if the second field in the line starts with '[' the next field is the mirror url. Instead the method should look for the matching ']'. The field after ']' is the mirror.

    @staticmethod
    def _get_primary_mirror_from_apt_sources(apt_sources):
        """Heuristically determine primary mirror from an apt sources.list."""
        with open(apt_sources, encoding="utf-8") as f:
            for line in f:
                fields = line.split()
                if len(fields) >= 3 and fields[0] == "deb":
                    if fields[1].startswith("["):
                        # options given, mirror is in third field
                        mirror_idx = 2
                    else:
                        mirror_idx = 1
                    if fields[mirror_idx].startswith("http://") or fields[
                        mirror_idx
                    ].startswith("https://"):
                        return fields[mirror_idx]

[Benjamin Drung (bdrung)]

Pull request: https://github.com/canonical/apport/pull/148

[Benjamin Drung (bdrung)]

https://github.com/canonical/apport/pull/154 got merged.

[Launchpad Janitor (janitor)]

This bug was fixed in the package apport - 2.26.1-0ubuntu2

---------------
apport (2.26.1-0ubuntu2) lunar; urgency=medium

  * fix(tests): Clear environment for test_run_as_real_user_no_sudo

apport (2.26.1-0ubuntu1) lunar; urgency=medium

  [ Benjamin Drung ]
  * New upstream bug-fix release.
    - SECURITY UPDATE: viewing an apport-cli crash with default pager could
      escalate privilege (LP: #2016023). Do not run sensible-pager as root
      if using sudo/pkexec.
    - Catch HTTPError in UserInterface.file_report (LP: #2008638)
    - Print proper error message if /proc/<pid> is gone (LP: #2008638)
    - Do not drop environment variables when calling GDB (LP: #2012374)
    - Fix parsing options with spaces in sources.list (LP: #1822712)
  * Disable Launchpad crash reports for 23.04 release

  [ Sebastien Bacher ]
  * Let subiquity collect the desktop installer details if available

 -- Benjamin Drung <email address hidden> Fri, 14 Apr 2023 00:17:27 +0200