Wikimedia Bugzilla is closed!

The inpuxbox extension appears to be incorrectly accessing $wgTitle 
and passing it into the parser. This results in failures of batch 
processes, such as the job queue:

dewiki:  Attempt to call member function of FakeTitle
dewiki:
dewiki:  Backtrace:
dewiki:  GlobalFunctions.php line 661 calls wfBacktrace()
dewiki:  FakeTitle.php line 7 calls wfDebugDieBacktrace()
dewiki:  FakeTitle.php line 48 calls FakeTitle::error()
dewiki:  Parser.php line 1391 calls FakeTitle::isTalkPage()
dewiki:  Parser.php line 899 calls Parser::replaceInternalLinks()
dewiki:  Parser.php line 221 calls Parser::internalParse()
dewiki:  OutputPage.php line 367 calls Parser::parse()
dewiki:  inputbox.php line 138 calls OutputPage::parse()
dewiki:  inputbox.php line 91 calls Inputbox::getSearchForm2()
dewiki:  inputbox.php line 59 calls Inputbox::render()
dewiki:  - line - calls renderInputbox()
dewiki:  Parser.php line 499 calls call_user_func_array()
dewiki:  Parser.php line 212 calls Parser::strip()
dewiki:  JobQueue.php line 189 calls Parser::parse()
dewiki:  JobQueue.php line 148 calls Job::refreshLinks()
dewiki:  runJobs.php line 15 calls Job::run()

On a quick examination, this is done indirectly through calling 
$wgOut->parse().