This happens while I'm viewing the revisions of an article, no matter by viewing the diff or checking those deleted revisions.
The article text cannot be shown, instead, a traceback:
{{MediaWiki:Tagline}}
MagicWordArray::parseMatch: parameter not found
Backtrace:
#0 /usr/local/apache/common-local/wmf-deployment/includes/MagicWord.php(674): MagicWordArray->parseMatch(Array)
#1 /usr/local/apache/common-local/wmf-deployment/includes/parser/Parser.php(3394): MagicWordArray->matchAndRemove(NULL)
#2 /usr/local/apache/common-local/wmf-deployment/includes/parser/Parser.php(909): Parser->doDoubleUnderscore('<div class="mw-...')
#3 /usr/local/apache/common-local/wmf-deployment/includes/parser/Parser.php(328): Parser->internalParse('<div class="mw-...')
#4 [internal function]: Parser->parse('<div class="mw-...', Object(Title), Object(ParserOptions), true, true, NULL)
#5 /usr/local/apache/common-local/wmf-deployment/includes/StubObject.php(58): call_user_func_array(Array, Array)
#6 /usr/local/apache/common-local/wmf-deployment/includes/StubObject.php(76): StubObject->_call('parse', Array)
#7 [internal function]: StubObject->__call('parse', Array)
#8 /usr/local/apache/common-local/wmf-deployment/includes/OutputPage.php(905): StubObject->parse('<div class="mw-...', Object(Title), Object(ParserOptions), true, true, NULL)
#9 /usr/local/apache/common-local/wmf-deployment/includes/OutputPage.php(2197): OutputPage->parse('<div class="mw-...', true, true)
#10 /usr/local/apache/common-local/wmf-deployment/includes/EditPage.php(726): OutputPage->wrapWikiMsg('<div class="mw-...', 'newarticletext')
#11 /usr/local/apache/common-local/wmf-deployment/includes/EditPage.php(438): EditPage->showIntro()
#12 /usr/local/apache/common-local/wmf-deployment/includes/EditPage.php(351): EditPage->edit()
#13 /usr/local/apache/common-local/wmf-deployment/includes/Wiki.php(541): EditPage->submit()
#14 /usr/local/apache/common-local/wmf-deployment/includes/Wiki.php(70): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#15 /usr/local/apache/common-local/wmf-deployment/index.php(117): MediaWiki->performRequestForTitle(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#16 /usr/local/apache/common-local/live-1.5/index.php(3): require('/usr/local/apac...')
#17 {main}
And at the same time, the <title> changed from normal to <title> - {{#switch:{{int:Conversionname}}|zh|zh-hans|zh-cn|zh-sg=维基百科，自由的百科全书|zh-hant|zh-tw|zh-hk=維基百科，自由的百科全書}}</title>
After some refresh, the error screen would disappear, but about 10m later, it appears again. Guess there's something wrong with the parser function.
The pages I attempted to view:
- http://zh.wikipedia.org/w/index.php?diff=11856199
- http://zh.wikipedia.org/w/index.php?title=%E7%B6%AD%E5%9F%BA%E4%BA%BA&action=edit&redlink=1
Version: unspecified
Severity: normal