Signature extraction failed / 'NoneType' object has no attribute 'group'

[rptb1]

Version 2015.11.21 on OS X 10.9.5 installed via MacPorts.

Some (not all) videos are failing with a signature extraction error, but it also looks like the code is not handling this case very well by not checking for a None result.

Thanks!

$ youtube-dl -v 'https://www.youtube.com/watch?v=qfodIWqR0II'
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'https://www.youtube.com/watch?v=qfodIWqR0II']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.11.21
[debug] Python version 2.7.10 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 2.8.2, ffprobe 2.8.2
[debug] Proxy map: {}
[youtube] qfodIWqR0II: Downloading webpage
[youtube] qfodIWqR0II: Downloading video info webpage
[youtube] qfodIWqR0II: Extracting video information
[youtube] {43} signature length 49.43, html5 player en_US-vflFEzfy7
[youtube] qfodIWqR0II: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflFEzfy7/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 828, in _decrypt_signature
    video_id, player_url, s
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 755, in _extract_signature_function
    cache_res = res(test_string)
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 807, in <lambda>
    return lambda s: initial_function([s])
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 254, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 55, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 135, in interpret_expression
    self._objects[variable] = self.extract_object(variable)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 220, in extract_object
    fields = obj_m.group('fields')
AttributeError: 'NoneType' object has no attribute 'group'
 (caused by AttributeError("'NoneType' object has no attribute 'group'",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 828, in _decrypt_signature
    video_id, player_url, s
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 755, in _extract_signature_function
    cache_res = res(test_string)
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 807, in <lambda>
    return lambda s: initial_function([s])
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 254, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 55, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 135, in interpret_expression
    self._objects[variable] = self.extract_object(variable)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 220, in extract_object
    fields = obj_m.group('fields')
AttributeError: 'NoneType' object has no attribute 'group'
Traceback (most recent call last):
  File "/opt/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 661, in extract_info
    ie_result = ie.extract(url)
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 290, in extract
    return self._real_extract(url)
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1367, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 838, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 828, in _decrypt_signature
    video_id, player_url, s
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 755, in _extract_signature_function
    cache_res = res(test_string)
  File "/opt/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 807, in <lambda>
    return lambda s: initial_function([s])
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 254, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 55, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 135, in interpret_expression
    self._objects[variable] = self.extract_object(variable)
  File "/opt/local/bin/youtube-dl/youtube_dl/jsinterp.py", line 220, in extract_object
    fields = obj_m.group('fields')
AttributeError: 'NoneType' object has no attribute 'group'
 (caused by AttributeError("'NoneType' object has no attribute 'group'",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[yan12125]

Such errors should be fixed in version 2015.11.24. Please update your copy via update instructions. Feel free to open a new issue if the problem is still in the latest version.

[rptb1]

Thanks @yan12125 . I did do "youtube-dl -U" before I submitted this issue, and followed the instructions (to use "port upgrade"). Perhaps "-U" should say this isn't enough?

[rptb1]

I did git clone, virtualenv, setup.py, and it all worked. Thanks.