KeyError when using 'ytsearch:' pseudo-URL

[BenWiederhake]

I followed the guide below

• I made sure I am using the latest version: running youtube-dl --version says 2017.12.14, which is just three days ago, and I just installed it from pip3 install. I ensured my version is 2017.12.14.
• I've verified and I assure that I'm running youtube-dl 2017.12.14

Before submitting an issue make sure you have:

• I at least skimmed through the README (holy shit is it long), and most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones. Only one match, and it's outdated and closed anyway.

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)

As this issue is a bug report, I provide the full verbose output as follows:

$ youtube-dl --verbose -i -x 'ytsearch:Zombie Nation — Kernkraft 400'
[debug] System config: []
[debug] User config: ['-u', 'PRIVATE', '-p', 'PRIVATE']
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '-i', '-x', 'ytsearch:Zombie Nation — Kernkraft 400']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.12.14
[debug] Python version 3.6.4rc1 - Linux-4.13.0-1-amd64-x86_64-with-debian-buster-sid
[debug] exe versions: ffmpeg 3.4-4, ffprobe 3.4-4
[debug] Proxy map: {}
[youtube:search] Downloading login page
[youtube:search] Looking up account info
[youtube:search] Logging in
[youtube:search] Checking cookie
[youtube:search] query "Zombie Nation — Kernkraft 400": Downloading page 1
ERROR: An extractor error has occurred. (caused by KeyError(1,)); 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 "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 437, in extract
    ie_result = self._real_extract(url)
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 2604, in _real_extract
    return self._get_n_results(query, 1)
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 2579, in _get_n_results
    html_content = data[1]['body']['content']
KeyError: 1
Traceback (most recent call last):
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 437, in extract
    ie_result = self._real_extract(url)
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 2604, in _real_extract
    return self._get_n_results(query, 1)
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 2579, in _get_n_results
    html_content = data[1]['body']['content']
KeyError: 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/home/eispin/.local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 450, in extract
    raise ExtractorError('An extractor error has occurred.', cause=e)
youtube_dl.utils.ExtractorError: An extractor error has occurred. (caused by KeyError(1,)); 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.

I added the -v flag to my command line to you run youtube-dl.

Description of my issue, suggested solution and other information

I got the syntax from here:

$ youtube-dl -i -x 'Zombie Nation — Kernkraft 400'
ERROR: 'Zombie Nation — Kernkraft 400' is not a valid URL. Set --default-search "ytsearch" (or run  youtube-dl "ytsearch:Zombie Nation — Kernkraft 400" ) to search YouTube

This seems to be related to the login mechanism. After deleting my config file, it behaves like this:

$ youtube-dl 'ytsearch:Zombie Nation'  # No login whatsoever
[youtube:search] query "Zombie Nation": Downloading page 1
[download] Downloading playlist: Zombie Nation
[youtube:search] playlist Zombie Nation: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[youtube] z5LW07FTJbI: Downloading webpage
[youtube] z5LW07FTJbI: Downloading video info webpage
[youtube] z5LW07FTJbI: Extracting video information
[youtube] z5LW07FTJbI: Downloading MPD manifest
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] Destination: Zombie Nation - Kernkraft 400-z5LW07FTJbI.f133.mp4
[download] 100% of 4.21MiB in 00:08
[download] Destination: Zombie Nation - Kernkraft 400-z5LW07FTJbI.f251.webm
[download] 100% of 3.46MiB in 00:01
[ffmpeg] Merging formats into "Zombie Nation - Kernkraft 400-z5LW07FTJbI.mkv"
Deleting original file Zombie Nation - Kernkraft 400-z5LW07FTJbI.f133.mp4 (pass -k to keep)
Deleting original file Zombie Nation - Kernkraft 400-z5LW07FTJbI.f251.webm (pass -k to keep)
[download] Finished downloading playlist: Zombie Nation


$  youtube-dl -u MYUSERNAME -p CORRECTPASSWORD 'ytsearch:Zombie Nation'
[youtube:search] Downloading login page
[youtube:search] Looking up account info
[youtube:search] Logging in
[youtube:search] Checking cookie
[youtube:search] query "Zombie Nation": Downloading page 1
ERROR: An extractor error has occurred. (caused by KeyError(1,)); 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.
[$? = 1]


$  youtube-dl -u MYUSERNAME -p WRONGPASSWORD 'ytsearch:Zombie Nation'
[youtube:search] Downloading login page
[youtube:search] Looking up account info
[youtube:search] Logging in
WARNING: Unable to login: Invalid password
[youtube:search] query "Zombie Nation": Downloading page 1
[download] Downloading playlist: Zombie Nation
[youtube:search] playlist Zombie Nation: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
[youtube] Downloading login page
[youtube] Looking up account info
[youtube] Logging in
WARNING: Unable to login: Invalid password
[youtube] z5LW07FTJbI: Downloading webpage
[youtube] z5LW07FTJbI: Downloading video info webpage
[youtube] z5LW07FTJbI: Extracting video information
[youtube] z5LW07FTJbI: Downloading MPD manifest
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] Zombie Nation - Kernkraft 400-z5LW07FTJbI.mkv has already been downloaded and merged
[download] Finished downloading playlist: Zombie Nation

Manual workaround: Any of:

• Manually search for youtube URLs, feed them to yourube-dl in a batch.
• Don't log in (huh)

[tjesp]

I still have this problem. If I removed my cookies.txt everything went fine (I assume that was logging me in).