Clicking on "Advanced" search and changing the default namespaces to search and clicking search returns:

``` lines=10
"Exception thrown by mediawiki.special.search" load.php:150
"TypeError: this.form is null" TypeError: this.form is null
Stack trace:
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z line 4 > eval:2:185
jQuery.event.dispatch@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:65:771
jQuery.event.add/elemData.handle@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:60:313
jQuery.event.trigger@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:64:460
.trigger/<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:75:425
.each@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:5:216
jQuery.prototype.each@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:2:215
.trigger@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:75:404
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z line 4 > eval:2:130
jQuery.Callbacks/fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:44:928
jQuery.Callbacks/self.add@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:45:488
jQuery.fn.ready@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:48:879
jQuery.fn.init@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:41:68
jQuery@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:1:637
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z line 4 > eval:1:84
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z line 4 > eval:1:1
runScript@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:160:473
execute/</checkCssHandles@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:160:958
execute/</cssHandle/<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:161:96
jQuery.Callbacks/fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:44:928
jQuery.Callbacks/self.fireWith@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:46:258
jQuery.Callbacks/self.fire@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:46:301
addEmbeddedCSS@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:155:871
execute@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:161:552
mw.loader</<.implement@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:168:145
@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z line 4 > eval:42:29
.globalEval/<@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:4:655
.globalEval@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:4:621
mw.loader</<.work@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:164:68
request@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:162:258
mw.loader</<.load@https://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20141210T212029Z:169:720
@https://www.mediawiki.org/w/index.php?title=Special%3ASearch&profile=advanced&search=mw.util.addPortletLink&fulltext=Search:248:1
```