KeyError: 'title' on ydl.extract_info() with "YoutubeDL({'check_formats': True})"

[jakeogh]

Checklist

• I'm reporting a bug unrelated to a specific site
• I've verified that I'm running yt-dlp version 2021.11.10.1. (update instructions)
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones. DO NOT post duplicates
• I've read the guidelines for opening an issue

Description

using git-latest a04e005:

$ ipython
Python 3.9.7 (default, Oct  5 2021, 15:51:35) 

In [1]: /delme >>>: from yt_dlp import YoutubeDL

In [2]: /delme >>>: url = "https://www.youtube.com/watch?v=ulxxfL6X3Ig"

In [3]: /delme >>>: with YoutubeDL({'check_formats': True}) as ydl:
               ...:     ydl.extract_info(url)
               ...: 
[youtube] ulxxfL6X3Ig: Downloading webpage
[youtube] ulxxfL6X3Ig: Downloading android player API JSON
[youtube] ulxxfL6X3Ig: Downloading MPD manifest
[youtube] ulxxfL6X3Ig: Downloading MPD manifest
[info] Testing format 247
[info] Testing format 22
[info] Testing format 136
[info] Testing format 136-dash
[info] Testing format 244
[info] Testing format 135
[info] Testing format 243
[info] Testing format 18
[info] Testing format 134
[info] Testing format 134-dash
[info] Testing format 242
[info] Testing format 133
[info] Testing format 278
[info] Testing format 160
[info] Testing format 17
[info] Testing format 251
[info] Testing format 251-dash
[info] Testing format 140
[info] Testing format 140-dash
[info] Testing format 139
[info] Testing format 139-dash
[info] Testing format sb0
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-3-a7e9c26c78b6> in <module>
      1 with YoutubeDL({'check_formats': True}) as ydl:
----> 2     ydl.extract_info(url)
      3 

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in extract_info(self, url, download, ie_key, extra_info, process, force_generic_extractor)
   1307                                ie_key, temp_id))
   1308                 break
-> 1309             return self.__extract_info(url, self.get_info_extractor(ie_key), download, extra_info, process)
   1310         else:
   1311             self.report_error('no suitable InfoExtractor for URL %s' % url)

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in wrapper(self, *args, **kwargs)
   1315         def wrapper(self, *args, **kwargs):
   1316             try:
-> 1317                 return func(self, *args, **kwargs)
   1318             except GeoRestrictedError as e:
   1319                 msg = e.msg

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in __extract_info(self, url, ie, download, extra_info, process)
   1353         self.add_default_extra_info(ie_result, ie, url)
   1354         if process:
-> 1355             return self.process_ie_result(ie_result, download, extra_info)
   1356         else:
   1357             return ie_result

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in process_ie_result(self, ie_result, download, extra_info)
   1403         if result_type == 'video':
   1404             self.add_extra_info(ie_result, extra_info)
-> 1405             ie_result = self.process_video_result(ie_result, download=download)
   1406             additional_urls = (ie_result or {}).get('additional_urls')
   1407             if additional_urls:

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in process_video_result(self, info_dict, download)
   2364             formats = LazyList(self._check_formats(formats[::-1])).reverse()
   2365 
-> 2366         if not formats or formats[0] is not info_dict:
   2367             # only set the 'formats' fields if the original info_dict list them
   2368             # otherwise we end up with a circular reference, the first (and unique)

/usr/lib/python3.9/site-packages/yt_dlp/utils.py in __getitem__(self, idx)
   4145             # We need to consume the entire iterable to be able to slice from the end
   4146             # Obviously, never use this with infinite iterables
-> 4147             self.__exhaust()
   4148             try:
   4149                 return self.__cache[idx]

/usr/lib/python3.9/site-packages/yt_dlp/utils.py in __exhaust(self)
   4116 
   4117     def __exhaust(self):
-> 4118         self.__cache.extend(self.__iterable)
   4119         # Discard the emptied iterable to make it pickle-able
   4120         self.__iterable = []

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in _check_formats(self, formats)
   1745             temp_file.close()
   1746             try:
-> 1747                 success, _ = self.dl(temp_file.name, f, test=True)
   1748             except (DownloadError, IOError, OSError, ValueError) + network_exceptions:
   1749                 success = False

/usr/lib/python3.9/site-packages/yt_dlp/YoutubeDL.py in dl(self, name, info, subtitle, test)
   2594         if new_info.get('http_headers') is None:
   2595             new_info['http_headers'] = self._calc_headers(new_info)
-> 2596         return fd.download(name, new_info, subtitle)
   2597 
   2598     def process_info(self, info_dict):

/usr/lib/python3.9/site-packages/yt_dlp/downloader/common.py in download(self, filename, info_dict, subtitle)
    397                         sleep_interval_sub))
    398                 time.sleep(sleep_interval_sub)
--> 399         ret = self.real_download(filename, info_dict)
    400         self._finish_multiline_status()
    401         return ret, True

/usr/lib/python3.9/site-packages/yt_dlp/downloader/mhtml.py in real_download(self, filename, info_dict)
    115         fragments = info_dict['fragments'][:1] if self.params.get(
    116             'test', False) else info_dict['fragments']
--> 117         title = info_dict['title']
    118         origin = info_dict['webpage_url']
    119 

KeyError: 'title'

Verbose log

I haven't been able to trigger it from the CLI yet.