Wikimedia Bugzilla is closed!

Created attachment 12924 [details]
stack trace

Spotted on beta while accessing: http://en.wikipedia.beta.wmflabs.org/wiki/San_Francisco



[22-Jul-2013 21:11:53] Fatal error: Call to a member function removeChild() on a non-object at /data/project/apache/common-local/php-master/extensions/MobileFrontend/includes/formatters/HtmlFormatter.php on line 256
Server: i-0000031a
Method: GET
URL: http://en.wikipedia.beta.wmflabs.org/wiki/San_Francisco
Cookie: enwikiUserID=25; enwikiUserName=MaxSem; centralnotice_bucket=1-4.2; centralauth_User=MaxSem; mfsecure=1; optin=1; mf_alpha=1
Backtrace:
#0 /data/project/apache/common-local/php-master/extensions/MobileFrontend/includes/formatters/HtmlFormatter.php(256): HtmlFormatter::removeElements()
#1 /data/project/apache/common-local/php-master/extensions/MobileFrontend/includes/formatters/HtmlFormatter.php(208): HtmlFormatter->removeElements(Array)
#2 /data/project/apache/common-local/php-master/extensions/MobileFrontend/includes/formatters/MobileFormatter.php(112): HtmlFormatter->filterContent()
#3 /data/project/apache/common-local/php-master/extensions/MobileFrontend/includes/MobileFrontend.body.php(48): MobileFormatter->filterContent()
#4 /data/project/apache/common-local/php-master/extensions/MobileFrontend/includes/skins/SkinMobile.php(44): ExtMobileFrontend->DOMParse(Object(OutputPage))
#5 /data/project/apache/common-local/php-master/includes/OutputPage.php(2071): SkinMobile->outputPage()
#6 /data/project/apache/common-local/php-master/includes/Wiki.php(572): OutputPage->output()
#7 /data/project/apache/common-local/php-master/includes/Wiki.php(458): MediaWiki->main()
#8 /data/project/apache/common-local/php-master/index.php(55): MediaWiki->run()
#9 /data/project/apache/common-local/w/index.php(3): require('/data/project/a...')
#10 {main}


To reproduce:

 On deployment-bastion:
 tail -f /data/project/logs/fatal.log

Then  curl -I http://en.m.wikipedia.beta.wmflabs.org/wiki/San_Francisco?bobobo

Headers:

HTTP/1.1 500 Internal Server Error
Server: Varnish
Content-Type: text/html; charset=utf-8
Content-Length: 2994
X-Varnish: 912598395, 1549110359
Via: 1.1 varnish, 1.1 varnish
X-Device: generic
Accept-Ranges: bytes
Date: Mon, 22 Jul 2013 21:05:54 GMT
Age: 1
Connection: keep-alive
X-Cache: deployment-cache-mobile01 miss (0), deployment-cache-mobile01 frontend miss (0)
Cache-Control: private, s-maxage=0, max-age=0, must-revalidate

Stacktrace is above :-)