I just spent an extraordinary amount of time tracking down a problem in this webserver (Solaris) that was caused by the web server crashing somewhere in in "new JSParser".
I worked around the problem by setting $wgResourceLoaderValidateJS to false in LocalSettings.
Finding this problem would have been made much easier if the codepath for load.php used as wfDebug(). I may be missing something, but it doesn't appear to use debugging calls at all.
Version: 1.20.x
Severity: enhancement