Traceback (most recent call last):

 "/usr/share/w3af/w3af/core/ui/gui/main.py", line 609, in start_scan_wrap
real_scan_start()

 "/usr/share/w3af/w3af/core/ui/gui/main.py", line 600, in real_scan_start
self.w3af.start()

 "/usr/share/w3af/w3af/core/controllers/w3afCore.py", line 191, in start
self.strategy.start()

 "/usr/share/w3af/w3af/core/controllers/core_helpers/strategy.py", line 96, in start
self._seed_discovery()

 "/usr/share/w3af/w3af/core/controllers/core_helpers/strategy.py", line 423, in _seed_discovery
self._seed_producer.seed_output_queue(cf.cf.get('targets'))

 "/usr/share/w3af/w3af/core/controllers/core_helpers/consumers/seed.py", line 104, in seed_output_queue
kb.kb.add_fuzzable_request(_seed)

 "/usr/share/w3af/w3af/core/data/kb/knowledge_base.py", line 283, in decorated
return _method(self, *args, **kwargs)

 "/usr/share/w3af/w3af/core/data/kb/knowledge_base.py", line 671, in add_fuzzable_request
self.add_url(fuzzable_request.get_url())

 "/usr/share/w3af/w3af/core/data/kb/knowledge_base.py", line 283, in decorated
return _method(self, *args, **kwargs)

 "/usr/share/w3af/w3af/core/data/kb/knowledge_base.py", line 652, in add_url
return self.urls.add(url)AttributeError: 'DBKnowledgeBase' object has no attribute 'urls'
Traceback (most recent call last):


 "test.py", line 60, in <module>

infoDownloader("https://www.youtube.com/playlist?list=PLScC8g4bqD47c-qHlsfhGH3j6Bg7jzFy-")


 "test.py", line 30, in infoDownloader

info = ydl.extract_info(playlist)


 "/usr/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 706, in extract_info

self.report_error(compat_str(e), e.format_traceback())


 "/usr/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 565, in report_error

self.trouble(error_message, tb)


 "/usr/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 535, in trouble

raise DownloadError(message, exc_info)
youtube_dl.utils.DownloadError: ERROR: Unable to extract title; 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.
