"Erroneous output template" when using the upload date with The Escapist

[Tailszefox]

youtube-dl -o "%(upload_date)s - %(title)s.%(ext)s" "http://www.escapistmagazine.com/videos/view/zero-punctuation/5394-Darkness-2"
[Escapist] 5394-Darkness-2: Extracting information
[Escapist] 5394-Darkness-2: Downloading webpage
[Escapist] 5394-Darkness-2: Downloading normal configuration
[Escapist] 5394-Darkness-2: Downloading hq configuration
ERROR: Erroneous output template

Usually, the upload date is replaced by "NA" when the extractor can't find it, but this seems to not be the case with The Escapist: instead, it's simply not defined and thus creates an error.

The problem can be solved by making the extractor for The Escapist return the upload_date key alongside everything else, even if it's set to None, but this seems like it could be a more broad problem. Shouldn't all values be set to NA if the extractor doesn't provide them, even if they are not defined?

[phihag]

Thanks for the report. This issue has been fixed in youtube-dl 2013.12.10. Type youtube-dl -U to update.