Weird cookies file rewrite behavior.

[Duoquote]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2019.08.02
• 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 bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

duoqu@DESKTOP-VDD1FLJ MINGW64 ~
$ youtube-dl "https://www.youtube.com/watch?v=urSpCj7dK_I" --cookies cookies.txt -F --verbose                                                                                               [debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=urSpCj7dK_I', '--cookies', 'cookies.txt', '-F', '--verbose']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2019.08.02
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.18362
[debug] exe versions: ffmpeg 4.1.3, ffprobe 4.1.3
[debug] Proxy map: {}
[youtube] urSpCj7dK_I: Downloading webpage
[youtube] urSpCj7dK_I: Downloading video info webpage
[youtube] {22} signature length 109, html5 player vfl0ft1-Z
[youtube] {18} signature length 109, html5 player vfl0ft1-Z
[youtube] {313} signature length 109, html5 player vfl0ft1-Z
[youtube] {271} signature length 105, html5 player vfl0ft1-Z
[youtube] {137} signature length 109, html5 player vfl0ft1-Z
[youtube] {248} signature length 109, html5 player vfl0ft1-Z
[youtube] {136} signature length 109, html5 player vfl0ft1-Z
[youtube] {247} signature length 109, html5 player vfl0ft1-Z
[youtube] {135} signature length 109, html5 player vfl0ft1-Z
[youtube] {244} signature length 109, html5 player vfl0ft1-Z
[youtube] {134} signature length 105, html5 player vfl0ft1-Z
[youtube] {243} signature length 109, html5 player vfl0ft1-Z
[youtube] {133} signature length 109, html5 player vfl0ft1-Z
[youtube] {242} signature length 109, html5 player vfl0ft1-Z
[youtube] {160} signature length 105, html5 player vfl0ft1-Z
[youtube] {278} signature length 105, html5 player vfl0ft1-Z
[youtube] {140} signature length 109, html5 player vfl0ft1-Z
[youtube] {249} signature length 109, html5 player vfl0ft1-Z
[youtube] {250} signature length 105, html5 player vfl0ft1-Z
[youtube] {251} signature length 105, html5 player vfl0ft1-Z
[youtube] {256} signature length 109, html5 player vfl0ft1-Z
[youtube] {258} signature length 105, html5 player vfl0ft1-Z
[info] Available formats for urSpCj7dK_I:
format code  extension  resolution note
249          webm       audio only DASH audio   57k , opus @ 50k, 1.14MiB
250          webm       audio only DASH audio   74k , opus @ 70k, 1.48MiB
140          m4a        audio only DASH audio  130k , m4a_dash container, mp4a.40.2@128k, 2.97MiB
251          webm       audio only DASH audio  148k , opus @160k, 2.91MiB
256          m4a        audio only DASH audio  194k , m4a_dash container, mp4a.40.5, 4.46MiB
258          m4a        audio only DASH audio  386k , m4a_dash container, mp4a.40.2, 8.85MiB
278          webm       256x144    144p  103k , webm container, vp9, 24fps, video only, 1.83MiB
160          mp4        256x144    144p  118k , avc1.4d400c, 24fps, video only, 2.52MiB
242          webm       426x240    240p  191k , vp9, 24fps, video only, 2.56MiB
133          mp4        426x240    240p  262k , avc1.4d4015, 24fps, video only, 5.55MiB
243          webm       640x360    360p  310k , vp9, 24fps, video only, 5.57MiB
134          mp4        640x360    360p  630k , avc1.4d401e, 24fps, video only, 6.65MiB
244          webm       854x480    480p  655k , vp9, 24fps, video only, 11.83MiB
135          mp4        854x480    480p 1152k , avc1.4d401e, 24fps, video only, 13.77MiB
247          webm       1280x720   720p 1415k , vp9, 24fps, video only, 24.86MiB
136          mp4        1280x720   720p 2314k , avc1.4d401f, 24fps, video only, 27.45MiB
248          webm       1920x1080  1080p 2509k , vp9, 24fps, video only, 45.52MiB
137          mp4        1920x1080  1080p 3878k , avc1.640028, 24fps, video only, 54.52MiB
271          webm       2560x1440  1440p 6414k , vp9, 24fps, video only, 122.32MiB
313          webm       3840x2160  2160p 12645k , vp9, 24fps, video only, 250.97MiB
18           mp4        640x360    medium  394k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 9.06MiB
22           mp4        1280x720   hd720 1253k , avc1.64001F, mp4a.40.2@192k (44100Hz) (best)
Traceback (most recent call last):
  File "__main__.py", line 19, in 
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpjwvl_v2x\build\youtube_dl\__init__.py", line 474, in main
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpjwvl_v2x\build\youtube_dl\__init__.py", line 467, in _real_main
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpjwvl_v2x\build\youtube_dl\YoutubeDL.py", line 565, in __exit__
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpjwvl_v2x\build\youtube_dl\utils.py", line 2736, in save
  File "C:\Python\Python34\lib\http\cookiejar.py", line 2068, in save
PermissionError: [Errno 13] Permission denied: 'cookies.txt'

Description

After an error or after listing formats, youtube-dl tries to rewrite the cookies.txt and if succeeds, leaves an empty cookies.txt file behind. I made the file read-only so just shows an error, not a huge bug but worth to mention I guess. And also there is nothing to do with git bash, behavior happens in windows cmd too. Maybe associated with choco installation of youtube-dl.

[dstftw]

This is expected behavior.