unsupported JS expression

[stuart-little]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.05.14. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• [x ] I've verified and I assure that I'm running youtube-dl 2017.05.14

youtube-dl --version returns 2017.05.14

Before submitting an issue make sure you have:

• At least skimmed through README and most notably FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

Previous instances of this type of issue seemed to have been resolved by updating the ydl version. I am already running hte latest version, as noted above.

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'-F', u'https://www.youtube.com/watch?v=wz6ei2cWw_M']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2017.05.14
[debug] Python version 2.7.9 - Linux-3.16.0-4-686-pae-i686-with-debian-8.8
[debug] exe versions: ffmpeg 2.6.9, ffprobe 2.6.9
[debug] Proxy map: {}
[youtube] wz6ei2cWw_M: Downloading webpage
[youtube] wz6ei2cWw_M: Downloading video info webpage
[youtube] wz6ei2cWw_M: Extracting video information
[youtube] {22} signature length 43.42, html5 player vfl8jhACg
[youtube] wz6ei2cWw_M: Downloading player https://www.youtube.com/yts/jsbin/player-vfl8jhACg/en_US/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1162, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1085, in _extract_signature_function
cache_res = res(test_string)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1138, in
return lambda s: initial_function([s])
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 254, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 55, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'oE"do"'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
(caused by ExtractorError(u'Unsupported JS expression u'oE"do"'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1162, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1085, in _extract_signature_function
cache_res = res(test_string)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1138, in
return lambda s: initial_function([s])
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 254, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 55, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'oE"do"'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 760, in extract_info
ie_result = ie.extract(url)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 433, in extract
ie_result = self._real_extract(url)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1755, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1172, in _decrypt_signature
'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1162, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1085, in _extract_signature_function
cache_res = res(test_string)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1138, in
return lambda s: initial_function([s])
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 254, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 55, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'oE"do"'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
(caused by ExtractorError(u'Unsupported JS expression u'oE"do"'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

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Description of your issue, suggested solution and other information

The command
youtube-dl -v -F https://www.youtube.com/watch?v=wz6ei2cWw_M

results in the message appended above, regarding an unsupported JS expression.