(i)filter_templates chokes on templates containing HTML markup

[ghost]

I thought I'd replace some of my ol' trusty (and nasty) regexes and stumbled on this bug when attempting to parse The Only Way Is Essex (series 11).

In [15]: print(text)
{{Use dmy dates|date=April 2014}}
{{Use British English|date=April 2014}}
{{Infobox television season
| show_name        = [[The Only Way Is Essex]]
| season_name      = <span style="color: white;">The Only Way Is Essex<br />'' Series 11</span>
| bgcolour         = #58FA58
| image            =
| caption          = Series 11 title card
| country          = [[United Kingdom]]
| network          = [[ITV2]]
| first_aired      = 23 February 2014
| last_aired       = 2 April 2014
| num_episodes     = 12
| dvd_release_date = TBA
| prev_season      = [[The Only Way Is Essex (series 10)|Series 10]]
| next_season      = [[The Only Way Is Essex (series 12)|Series 12]]
}}

The '''eleventh series''' of the [[United Kingdom|British]] semi-reality television programme ''[[The Only Way Is Essex]]'' was confirmed on 30 January 2014 when it had been announced that it had renewed for a further three series, the eleventh, twelfth and thirteenth.<ref>http://www.digitalspy.co.uk/tv/s143/the-only-way-is-essex/news/a547651/the-only-way-is-essex-to-air-3-series-this-yearThe '''eleventh series'''t; The '''eleventh series''' of the [[United Kin aThe '''eleventh series''' of the [[United Kingdom|British]] semi-reality television programme ''[[The Only Way Is Essex]]'urThe '''eleventh series''' uriThe '''eleventh sericiaThe '''eleventh series''' of the [[UniteieThe '''eleventh series''' of the [[Unisaw the return of Lydia Bright.

In [16]: mwparserfromhell.parse(text).filter_templates()
Out[16]:
['{{Use dmy dates|date=April 2014}}',
 '{{Use British English|date=April 2014}}']

In [17]: print(text2)
{{Use dmy dates|date=April 2014}}
{{Use British English|date=April 2014}}
{{Infobox television season
| show_name        = [[The Only Way Is Essex]]
| season_name      =
| bgcolour         = #58FA58
| image            =
| caption          = Series 11 title card
| country          = [[United Kingdom]]
| network          = [[ITV2]]
| first_aired      = 23 February 2014
| last_aired       = 2 April 2014
| num_episodes     = 12
| dvd_release_date = TBA
| prev_season      = [[The Only Way Is Essex (series 10)|Series 10]]
| next_season      = [[The Only Way Is Essex (series 12)|Series 12]]
}}

The '''eleventh series''' of the [[United Kingdom|British]] semi-reality television programme ''[[The Only Way Is Essex]]'' was confirmed on 30 January 2014 when it had been announced that it had renewed for a further three series, the eleventh, twelfth and thirteenth.&lt;ref&gt;http://www.digitalspy.co.uk/tv/s143/the-only-way-is-essex/news/a547651/the-only-way-is-essex-to-air-3-series-this-year-itv2-says.html&lt;/ref&gt; The series premiered on 23 February 2014 with a 60-minute special, and was followed by another 11 episodes. This was also the first series not to include [[Lucy Mecklenburgh]] after her departure during the Christmas special after the [[The Only Way Is Essex (series 10)|tenth series]]. The series also saw the return of Lydia Bright.

In [18]: mwparserfromhell.parse(text2).filter_templates()
Out[18]:
['{{Use dmy dates|date=April 2014}}',
 '{{Use British English|date=April 2014}}',
 '{{Infobox television season\n| show_name        = [[The Only Way Is Essex]]\n| season_name      = \n| bgcolour         = #58FA58\n| image            =  \n| caption          = Series 11 title card\n| country          = [[United Kingdom]]\n| network          = [[ITV2]]\n| first_aired      = 23 February 2014\n| last_aired       = 2 April 2014\n| num_episodes     = 12\n| dvd_release_date = TBA\n| prev_season      = [[The Only Way Is Essex (series 10)|Series 10]]\n| next_season      = [[The Only Way Is Essex (series 12)|Series 12]]\n}}']

[earwig]

Right here:

<br />'' Series 11</span>

The open-italics tag is not closed where it should be, so the parser gets confused and thinks it extends to the beginning of ''[[The Only Way Is Essex]]'', breaking the template.

Until #40 gets addressed, you can fix this by doing mwparserfromhell.parse(text, skip_style_tags=True) instead.

[ghost]

Cheers.