From https://integration.wikimedia.org/ci/job/beta-scap-eqiad/106921/console:
14:12:48 14:12:48 Updating ExtensionMessages-master.php 14:12:49 14:12:49 Last output: 14:12:49 Fatal error: Uncaught exception 'Exception' with message '/mnt/srv/mediawiki-staging/php-master/extensions/RevisionSlider/extension.json does not exist!' in /mnt/srv/mediawiki-staging/php-master/includes/registration/ExtensionRegistry.php:106 14:12:49 Stack trace: 14:12:49 #0 /mnt/srv/mediawiki-staging/php-master/includes/GlobalFunctions.php(115): ExtensionRegistry->queue('/mnt/srv/mediaw...') 14:12:49 #1 /mnt/srv/mediawiki-staging/wmf-config/CommonSettings-labs.php(344): wfLoadExtension('RevisionSlider') 14:12:49 #2 /mnt/srv/mediawiki/wmf-config/CommonSettings.php(3248): require('/mnt/srv/mediaw...') 14:12:49 #3 /mnt/srv/mediawiki-staging/php-master/LocalSettings.php(5): require_once('/mnt/srv/mediaw...') 14:12:49 #4 /mnt/srv/mediawiki-staging/php-master/maintenance/doMaintenance.php(83): require('/mnt/srv/mediaw...') 14:12:49 #5 /mnt/srv/mediawiki-staging/php-master/maintenance/mergeMessageFileList.php(169): require_once('/mnt/srv/mediaw...') 14:12:49 #6 /mnt/srv/mediawiki-staging/multiversion/MWScript.php(97): require_once('/mnt/srv/mediaw...') 14:12:49 #7 {main} 14:12:49 thrown in /mnt/srv/mediawiki-staging/php-master/includes/registration/ExtensionRegistry.php on line 106 14:12:49 14:12:49 Finished l10n-update (duration: 00m 00s) 14:12:49 14:12:49 Unhandled error: 14:12:49 Traceback (most recent call last): 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/cli.py", line 242, in run 14:12:49 exit_status = app.main(app.extra_arguments) 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/main.py", line 304, in main 14:12:49 return super(Scap, self).main(*extra_args) 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/main.py", line 46, in main 14:12:49 self._before_cluster_sync() 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/main.py", line 326, in _before_cluster_sync 14:12:49 version, wikidb, self.verbose, self.config) 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/utils.py", line 303, in context_wrapper 14:12:49 return func(*args, **kwargs) 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/tasks.py", line 546, in update_localization_cache 14:12:49 wikidb, ext_list, new_extension_messages, verbose_messagelist)) 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/utils.py", line 303, in context_wrapper 14:12:49 return func(*args, **kwargs) 14:12:49 File "/usr/lib/python2.7/dist-packages/scap/utils.py", line 400, in sudo_check_call 14:12:49 raise subprocess.CalledProcessError(proc.returncode, cmd) 14:12:49 CalledProcessError: Command '/usr/local/bin/mwscript mergeMessageFileList.php --wiki="eowiki" --list-file="/srv/mediawiki-staging/wmf-config/extension-list" --output="/tmp/tmp.ypH217F6Qp" ' returned non-zero exit status 255 14:12:49 14:12:49 scap failed: CalledProcessError Command '/usr/local/bin/mwscript mergeMessageFileList.php --wiki="eowiki" --list-file="/srv/mediawiki-staging/wmf-config/extension-list" --output="/tmp/tmp.ypH217F6Qp" ' returned non-zero exit status 255 (duration: 00m 22s)