apt-add-repository failing in Ubuntu 14.04 because of threading.py

Ran into an interesting one today:

# sudo add-apt-repository ppa:ondrej/apache2


Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmpnv_gva8h/secring.gpg' created
gpg: keyring `/tmp/tmpnv_gva8h/pubring.gpg' created
gpg: requesting key E5267A6C from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpnv_gva8h/trustdb.gpg: trustdb created
gpg: key E5267A6C: public key "Launchpad PPA for Ond\xc5\x99ej Sur�" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner
File "/usr/lib/python3.4/threading.py", line 868, in run
self._target(*self._args, **self._kwargs)
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 687, in addkey_func
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 370, in add_key
return apsk.add_ppa_signing_key()
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 261, in add_ppa_signing_key
tmp_export_keyring, signing_key_fingerprint, tmp_keyring_dir):
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 210, in _verify_fingerprint
got_fingerprints = self._get_fingerprints(keyring, keyring_dir)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 202, in _get_fingerprints
output = subprocess.check_output(cmd, universal_newlines=True)
File "/usr/lib/python3.4/subprocess.py", line 609, in check_output
output, unused_err = process.communicate(inputdata, timeout=timeout)
File "/usr/lib/python3.4/subprocess.py", line 947, in communicate
stdout = _eintr_retry_call(self.stdout.read)
File "/usr/lib/python3.4/subprocess.py", line 491, in _eintr_retry_call
return func(*args)
File "/usr/lib/python3.4/encodings/ascii.py", line 26, in decode
return codecs.ascii_decode(input, self.errors)[0] UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 92: ordinal not in range(128)

Long story short, turns out it was due to my locale settings not being configured properly.

I applied the first suggestion of regenerating locales, and then the second one of setting default locales in /etc/default/locale, closing the SSH session, and opening it again. That fixed things.

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