Commenting out the ddebs lines, I get:
apport-retrace -v -s -R -S system ./_usr_bin_gnome-shell-modified.1000.crash Get:1 http://ppa.launchpad.net/saiarcot895/chromium-dev/ubuntu focal InRelease [20.8 kB] Get:2 https://mirror.init7.net/ubuntu focal InRelease [255 kB] Get:3 http://ppa.launchpad.net/saiarcot895/chromium-dev/ubuntu focal/main amd64 Packages [1604 B] Get:4 https://mirror.init7.net/ubuntu focal-updates InRelease [79.7 kB] Get:5 http://ppa.launchpad.net/saiarcot895/chromium-dev/ubuntu focal/main Translation-en [1084 B] Get:6 https://mirror.init7.net/ubuntu focal-backports InRelease [79.7 kB] Get:7 https://mirror.init7.net/ubuntu focal-security InRelease [79.7 kB] Get:8 https://mirror.init7.net/ubuntu focal/restricted Sources [7032 B] Get:9 https://mirror.init7.net/ubuntu focal/multiverse Sources [176 kB] Get:10 https://mirror.init7.net/ubuntu focal/main Sources [838 kB] Get:11 https://mirror.init7.net/ubuntu focal/universe Sources [9792 kB] Get:12 https://mirror.init7.net/ubuntu focal/main amd64 Packages [972 kB] Get:13 https://mirror.init7.net/ubuntu focal/main Translation-en [500 kB] Get:14 https://mirror.init7.net/ubuntu focal amd64 Contents (deb) [41.3 MB] Get:15 https://mirror.init7.net/ubuntu focal/restricted amd64 Packages [21.4 kB] Get:16 https://mirror.init7.net/ubuntu focal/restricted Translation-en [6136 B] Get:17 https://mirror.init7.net/ubuntu focal/universe amd64 Packages [8651 kB] Get:18 https://mirror.init7.net/ubuntu focal/universe Translation-en [5161 kB] Get:19 https://mirror.init7.net/ubuntu focal/multiverse amd64 Packages [145 kB] Get:20 https://mirror.init7.net/ubuntu focal/multiverse Translation-en [106 kB] Fetched 68.2 MB in 6s (1020 kB/s) Fetched 0 B in 0s (0 B/s) Extracting downloaded debs... Traceback (most recent call last): File "/usr/bin/apport-retrace", line 322, in <module> sandbox, cache, outdated_msg = apport.sandboxutils.make_sandbox( File "/usr/lib/python3/dist-packages/apport/sandboxutils.py", line 220, in make_sandbox pkgs = needed_runtime_packages(report, sandbox_dir, pkgmap_cache_dir, pkg_versions, verbose) File "/usr/lib/python3/dist-packages/apport/sandboxutils.py", line 92, in needed_runtime_packages pkg = apport.packaging.get_file_package(l, True, pkgmap_cache_dir, File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 490, in get_file_package return self._search_contents(file, map_cachedir, release, arch) File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 1296, in _search_contents url = '%s/dists/%s%s/Contents-%s.gz' % (self._get_mirror(), release, pocket, arch) File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 1252, in _get_mirror self._mirror = self._get_primary_mirror_from_apt_sources('/etc/apt/sources.list') File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 1242, in _get_primary_mirror_from_apt_sources raise SystemError('cannot determine default mirror: %s does not contain a valid deb line' SystemError: cannot determine default mirror: /etc/apt/sources.list does not contain a valid deb line
Commenting out the ddebs lines, I get:
apport-retrace -v -s -R -S system ./_usr_ bin_gnome- shell-modified. 1000.crash ppa.launchpad. net/saiarcot895 /chromium- dev/ubuntu focal InRelease [20.8 kB] /mirror. init7.net/ ubuntu focal InRelease [255 kB] ppa.launchpad. net/saiarcot895 /chromium- dev/ubuntu focal/main amd64 Packages [1604 B] /mirror. init7.net/ ubuntu focal-updates InRelease [79.7 kB] ppa.launchpad. net/saiarcot895 /chromium- dev/ubuntu focal/main Translation-en [1084 B] /mirror. init7.net/ ubuntu focal-backports InRelease [79.7 kB] /mirror. init7.net/ ubuntu focal-security InRelease [79.7 kB] /mirror. init7.net/ ubuntu focal/restricted Sources [7032 B] /mirror. init7.net/ ubuntu focal/multiverse Sources [176 kB] /mirror. init7.net/ ubuntu focal/main Sources [838 kB] /mirror. init7.net/ ubuntu focal/universe Sources [9792 kB] /mirror. init7.net/ ubuntu focal/main amd64 Packages [972 kB] /mirror. init7.net/ ubuntu focal/main Translation-en [500 kB] /mirror. init7.net/ ubuntu focal amd64 Contents (deb) [41.3 MB] /mirror. init7.net/ ubuntu focal/restricted amd64 Packages [21.4 kB] /mirror. init7.net/ ubuntu focal/restricted Translation-en [6136 B] /mirror. init7.net/ ubuntu focal/universe amd64 Packages [8651 kB] /mirror. init7.net/ ubuntu focal/universe Translation-en [5161 kB] /mirror. init7.net/ ubuntu focal/multiverse amd64 Packages [145 kB] /mirror. init7.net/ ubuntu focal/multiverse Translation-en [106 kB] apport- retrace" , line 322, in <module> sandboxutils. make_sandbox( python3/ dist-packages/ apport/ sandboxutils. py", line 220, in make_sandbox runtime_ packages( report, sandbox_dir, pkgmap_cache_dir, pkg_versions, verbose) python3/ dist-packages/ apport/ sandboxutils. py", line 92, in needed_ runtime_ packages packaging. get_file_ package( l, True, pkgmap_cache_dir, python3/ dist-packages/ apport/ packaging_ impl.py" , line 490, in get_file_package contents( file, map_cachedir, release, arch) python3/ dist-packages/ apport/ packaging_ impl.py" , line 1296, in _search_contents %s%s/Contents- %s.gz' % (self._ get_mirror( ), release, pocket, arch) python3/ dist-packages/ apport/ packaging_ impl.py" , line 1252, in _get_mirror primary_ mirror_ from_apt_ sources( '/etc/apt/ sources. list') python3/ dist-packages/ apport/ packaging_ impl.py" , line 1242, in _get_primary_ mirror_ from_apt_ sources sources. list does not contain a valid deb line
Get:1 http://
Get:2 https:/
Get:3 http://
Get:4 https:/
Get:5 http://
Get:6 https:/
Get:7 https:/
Get:8 https:/
Get:9 https:/
Get:10 https:/
Get:11 https:/
Get:12 https:/
Get:13 https:/
Get:14 https:/
Get:15 https:/
Get:16 https:/
Get:17 https:/
Get:18 https:/
Get:19 https:/
Get:20 https:/
Fetched 68.2 MB in 6s (1020 kB/s)
Fetched 0 B in 0s (0 B/s)
Extracting downloaded debs...
Traceback (most recent call last):
File "/usr/bin/
sandbox, cache, outdated_msg = apport.
File "/usr/lib/
pkgs = needed_
File "/usr/lib/
pkg = apport.
File "/usr/lib/
return self._search_
File "/usr/lib/
url = '%s/dists/
File "/usr/lib/
self._mirror = self._get_
File "/usr/lib/
raise SystemError('cannot determine default mirror: %s does not contain a valid deb line'
SystemError: cannot determine default mirror: /etc/apt/