+++ This bug was initially created as a clone of Bug #55590 +++
Bug 55590 was "discovered" by CirrusSearch's overzealous rendering so I'm cloning it to make this one. That bug caused crashing which is bad the crashing happens without CirrusSearch. Its just that CirrusSearch casts a wide net (due to this bug) and 55590 throws a bomb in the net so the search results page blows up.
The part of the backtrace that matters here:
#17 /usr/local/apache/common-local/php-1.22wmf21/includes/search/SearchEngine.php(868): CirrusSearch->getTextFromContent(Object(Title), Object(WikitextContent))
#18 /usr/local/apache/common-local/php-1.22wmf21/includes/search/SearchEngine.php(954): SearchResult->initText()
#19 /usr/local/apache/common-local/php-1.22wmf21/includes/specials/SpecialSearch.php(651): SearchResult->getByteSize()
#20 /usr/local/apache/common-local/php-1.22wmf21/includes/specials/SpecialSearch.php(543): SpecialSearch->showHit(Object(CirrusSearchResult), Array)