Traceback (most recent call last):
  File "/usr/bin/apport-retrace", line 331, in <module>
    report['DistroRelease'], pkgs, options.verbose, options.cache)
  File "/usr/lib/python2.7/dist-packages/apport/packaging_impl.py", line 441, in install_packages
    c.update(fetchProgress)
  File "/usr/lib/python2.7/dist-packages/apt/deprecation.py", line 98, in deprecated_function
    return func(*args, **kwds)
  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 410, in update
    raise FetchFailedException(e)
FetchFailedException: W:GPG error: http://ftp.de.debian.org unstable InRelease: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://ftp.de.debian.org testing InRelease: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://security.ubuntu.com oneiric-security Release: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://extras.ubuntu.com oneiric Release: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://download.virtualbox.org natty Release: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://archive.ubuntu.com oneiric Release: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://archive.ubuntu.com oneiric-updates Release: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., W:GPG error: http://archive.ubuntu.com oneiric-proposed Release: No keyring installed in /tmp/tmpNt56nr/system/apt//etc/apt/trusted.gpg.d/., E:Method gzip has died unexpectedly!, E:Sub-process gzip received signal 2., E:Method gpgv has died unexpectedly!, E:Sub-process gpgv received signal 2., E:Method http has died unexpectedly!, E:Sub-process http returned an error code (100), E:Method http has died unexpectedly!, E:Sub-process http returned an error code (100), E:Method http has died unexpectedly!, E:Sub-process http returned an error code (100), E:Method http has died unexpectedly!, E:Sub-process http returned an error code (100), E:Method http has died unexpectedly!, E:Sub-process http returned an error code (100)