Error log from nginx.

Some lines are missing, I do not know why, but it can be seen the call loop anyway. There are 256 lines with the same calls pattern.

PHP message: PHP Fatal error:  Maximum function nesting level of '256' reached, aborting! in /srv/www/mediawiki/master/includes/user/User.php on line 1184
PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /srv/www/mediawiki/master/index.php:0
PHP message: PHP   2. MediaWiki->run() /srv/www/mediawiki/master/index.php:43
PHP message: PHP   3. MediaWiki->main() /srv/www/mediawiki/master/includes/MediaWiki.php:523
PHP message: PHP   4. MediaWiki->performRequest() /srv/www/mediawiki/master/includes/MediaWiki.php:862
PHP message: PHP   5. SpecialPageFactory::executePath() /srv/www/mediawiki/master/includes/Media
2017/05/21 15:19:32 [error] 5144#5144: *1213 FastCGI sent in stderr: "SessionBackend.php:687
PHP message: PHP  21. Hooks::run() /srv/www/mediawiki/master/includes/session/CookieSessionProvider.php:203
PHP message: PHP  22. SecureSessions->onUserSetCookies() /srv/www/mediawiki/master/includes/Hooks.php:186
PHP message: PHP  23. SecureSessions->updateSessionCache() /srv/www/mediawiki/master/extensions/SecureSessions/SecureSessions.hooks.php:171
PHP message: PHP  24. WebRequest->getSessionData() /srv/www/mediawiki/master/extensions/SecureSessions/SecureSessions.hooks.php:454
PHP message: PHP  25. WebRequest->getSession() /srv/www/mediawiki/master/includes/WebRequest.php:1033
PHP message: PHP  26. MediaWiki\Session\SessionManager->getSessionById() /srv/www/mediawiki/master/includes/WebRequest.php:729
PHP message: PHP  27. MediaWiki\Session\SessionManager->getSessionFromInfo() /srv/www/mediawiki/master/includes/session/SessionManager.php:213
PHP message: PHP  28. Wikimedia\ScopedCallback::consume() /srv/www/mediawiki/master/includes/session/SessionManager.php:885
PHP message: PHP  29. Wikimedia\ScopedCallback->__destruct() /srv/www/mediawiki/master/vendor/wikimedia/scoped-callback/src/ScopedCallback.php:56
PHP message: PHP  30. call_user_func_array:{/srv/www/mediawiki/master/vendor/wikimedia/scoped-callback/src/ScopedCallback.php:76}() /srv/www/mediawiki/master/vendor/wikimedia/scoped-callback/src/ScopedCallback.php:76
PHP message: PHP  31. MediaWiki\Session\SessionBackend->MediaWiki\Session\{closure}() /srv/www/mediawiki/master/vendor/wikimedia/scoped-callback/src/ScopedCallback.php:76
PHP message: PHP  32. MediaWiki\Session\SessionBackend->save() /srv/www/mediawiki/master/includes/session/SessionBackend.php:596
PHP message: PHP  33. MediaWiki\Session\CookieSessionProvider->persistSession() /srv/www/mediawiki/master/includes/session/SessionBackend.php:687
PHP message: PHP  34. Hooks::run() /srv/www/mediawiki/master/includes/session/CookieSessionProvider.php:203