Here is another regression I noticed when searching for things in JS pages:
Searching for "Tools/APC" on MediaWiki and User namespaces of Portuguese Wikipedia I get these:
Lucene: Results 1 - 7 of 7
https://pt.wikipedia.org/w/index.php?title=Especial%3APesquisar&profile=advanced&search=%22Tools%2FAPC%22&fulltext=Search&ns2=1&ns8=1&profile=advanced&srbackend=LuceneSearch
Cirrus: Result 1 of 1
https://pt.wikipedia.org/w/index.php?title=Especial%3APesquisar&profile=advanced&search=%22Tools%2FAPC%22&fulltext=Search&ns2=1&ns8=1&profile=advanced&srbackend=CirrusSearch
Version: unspecified
Severity: normal
URL: https://pt.wikipedia.org/w/index.php?title=Especial%3APesquisar&profile=advanced&search=%22Tools%2FAPC%22&fulltext=Search&ns2=1&ns8=1&profile=advanced&srbackend=CirrusSearch
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=68920