s@Lubuntu:~$ sudo add-apt-repository ppa:yorba/ppa
[sudo] password for s:
You are about to add the following PPA to your system:
The Yorba PPA is maintained by the Yorba Foundation and home to the Shotwell Photo Manager, the Geary email client, and gexiv2 (a GObject wrapper for the Exiv2 metadata library).
More info:
https://launchpad.net/~yorba/+archive/ppaPress [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 132, in add_ppa_signing_key
tmp_keyring_dir = tempfile.mkdtemp()
File "/usr/lib/python2.7/tempfile.py", line 322, in mkdtemp
name = names.next()
File "/usr/lib/python2.7/tempfile.py", line 141, in next
letters = [choose(c) for dummy in "123456"]
File "/usr/lib/python2.7/random.py", line 274, in choice
return seq[int(self.random() * len(seq))] # raises IndexError if seq is empty
ValueError: cannot convert float NaN to integer
s@Lubuntu:~$