See https://integration.wikimedia.org/ci/job/beta-scap-eqiad/319592/console
I am not sure what might be causing it.
10:44:10 Checking for new runtime errors locally 10:44:10 Scap failed!: Call to mwscript eval.php returned: 255 10:44:10 stderr: Fatal error: Uncaught Exception: Unable to open file /srv/mediawiki-staging/php-master/extensions/PagedTiffHandler/extension.json: filemtime(): stat failed for /srv/mediawiki-staging/php-master/extensions/PagedTiffHandler/extension.json in /srv/mediawiki-staging/php-master/includes/registration/ExtensionRegistry.php:176 Stack trace: #0 /srv/mediawiki-staging/php-master/includes/GlobalFunctions.php(51): ExtensionRegistry->queue('/srv/mediawiki-...') #1 /srv/mediawiki-staging/wmf-config/CommonSettings.php(611): wfLoadExtension('PagedTiffHandle...') #2 /srv/mediawiki-staging/php-master/LocalSettings.php(5): require('/srv/mediawiki-...') #3 /srv/mediawiki-staging/php-master/includes/Setup.php(143): require_once('/srv/mediawiki-...') #4 /srv/mediawiki-staging/php-master/maintenance/doMaintenance.php(90): require_once('/srv/mediawiki-...') #5 /srv/mediawiki-staging/php-master/maintenance/CommandLineInc.php(74): require('/srv/mediawiki-...') #6 /srv/mediawiki-staging/php-master/maintenance/eval.php(39): require_once('/srv/mediaw in /srv/mediawiki-staging/php-master/includes/registration/ExtensionRegistry.php on line 176 Fatal error: Uncaught Error: Class 'WebRequest' not found in /srv/mediawiki-staging/php-master/includes/HeaderCallback.php:63 Stack trace: #0 [internal function]: MediaWiki\HeaderCallback::callback() #1 {main} thrown in /srv/mediawiki-staging/php-master/includes/HeaderCallback.php on line 63 10:44:10 Unhandled error: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/scap/cli.py", line 341, in run exit_status = app.main(app.extra_arguments) File "/usr/lib/python2.7/dist-packages/scap/main.py", line 693, in main return super(ScapWorld, self).main(*extra_args) File "/usr/lib/python2.7/dist-packages/scap/main.py", line 81, in main self._check_fatals() File "/usr/lib/python2.7/dist-packages/scap/main.py", line 207, in _check_fatals raise RuntimeError(errmsg.format('returned', e.exit_code)) RuntimeError: Scap failed!: Call to mwscript eval.php returned: 255 10:44:10 scap failed: RuntimeError Scap failed!: Call to mwscript eval.php returned: 255 (duration: 00m 00s)