[Bug 1061101] Re: TypeError: object of type 'NoneType' has no len()

[Michael Galyuk]

I also caught the bug when try:
apt-add-repository ppa:pandora-net/ppa

You are about to add the following PPA to your system:
 P2P social network Pandora
 More info: https://launchpad.net/~pandora-net/+archive/ppa
Press [ENTER] to continue or ctrl-c to cancel adding it

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 99, in run
    self.add_ppa_signing_key(self.ppa_path)
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 127, in add_ppa_signing_key
    if len(signing_key_fingerprint) < 160/8:
TypeError: object of type 'NoneType' has no len()

What's wrong?

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https://bugs.launchpad.net/bugs/1061101

Title:
  TypeError: object of type 'NoneType' has no len()

Status in “software-properties” package in Ubuntu:
  Triaged

Bug description:
  On quantal::

  $ sudo add-apt-repository ppa:undistract-me-packagers/daily 
  You are about to add the following PPA to your system:
   Builds of https://launchpad.net/undistract-me
   More info: https://launchpad.net/~undistract-me-packagers/+archive/daily
  Press [ENTER] to continue or ctrl-c to cancel adding it

  Exception in thread Thread-1:
  Traceback (most recent call last):
    File "/usr/lib/python3.2/threading.py", line 740, in _bootstrap_inner
      self.run()
    File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 141, in run
      self.add_ppa_signing_key(self.ppa_path)
    File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 223, in add_ppa_signing_key
      tmp_keyring, tmp_secret_keyring, signing_key_fingerprint, tmp_keyring_dir):
    File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 145, in _recv_key
      if not verify_keyid_is_v4(signing_key_fingerprint):
    File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 126, in verify_keyid_is_v4
      return len(signing_key_fingerprint) >= 160/8
  TypeError: object of type 'NoneType' has no len()

  At this point, the new entry in /etc/apt/sources.list.d/, but the key
  has not been added.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: python-software-properties 0.92.9
  ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
  Uname: Linux 3.5.0-15-generic x86_64
  ApportVersion: 2.6.1-0ubuntu1
  Architecture: amd64
  Date: Wed Oct  3 18:26:48 2012
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: software-properties
  UpgradeStatus: Upgraded to quantal on 2012-08-19 (45 days ago)

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