Comment 3 for bug 1063350

I have the same problem. Plain install of Ubuntu 10.04 server 32 bit.

apt-get install python-software-properties
OK

apt-add-repository ppa:zfs-native/stable
...

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 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

The file /etc/apt/sources.list.d/zfs-native-stable-precise.list is there then, but I think keys are not setup correctly, I got signing alerts when installing software from that ppa.