[8.2 RC2] White Screen of Death when Accessing Admin Page

[MTRichards]

When I log in as an admin and I try to get to the admin page via the top right menu (Admin option) I get a white screen of death.

Expected behavior:
Click on the admin panel and be able to see the admin page, and manage apps that are enabled.

What actually Happened:
Click on the admin panel and get a white screen of death. Log file below.

Likely this is the LDAP app, because as soon as I disable the LDAP app, the white screen goes away and I can access settings on the server.

Log Entry:

Setup:
SLES
MySQL
Windows 10 Firefox (repeated with Windows 8.1 Firefox and Chrome)
ownCloud 8.2.0 RC2 released 10/14/2015.
Dropped this onto the SLES enterprise appliance base build, and everything else seems to be working except this.

[LukasReschke]

@MTRichards Bonus points for pasting the log data instead of unsearchable screenshots 🙊

[LukasReschke]

Also could you take a look at the PHP error log? /var/log/apache2/error.log or so?

[RobinMcCorkell]

Looks like it might be https://github.com/owncloud/core/blob/master/apps/user_ldap/lib/configuration.php#L153, which is invalid syntax on PHP <5.6 (I think). Basically, empty() must be run on a variable, and not on a function result. Fun fact though: if(empty($var)) is equivalent to if(!$var)

cc @blizzz

[MTRichards]

I know, right? I am really helpful...
The issue is clear in the last line of the log, so no real need to search.

There is Nothing in the error_log for PHP

[LukasReschke]

@DeepDiver1975 Don't we have PHP 5.5 execution for master as well on CI?

[MTRichards]

PHP info on this server (note: text and searchable):
PHP Version 5.4.20

System Linux eval-appliance-oc8ee-20150915-813-1 3.11.10-29-default #1 SMP Thu Mar 5 16:24:00 UTC 2015 (338c513) x86_64
Server API Apache 2.0 Handler
Virtual Directory Support disabled
Configuration File (php.ini) Path /etc/php5/apache2
Loaded Configuration File /etc/php5/apache2/php.ini
Scan this dir for additional .ini files /etc/php5/conf.d
Additional .ini files parsed /etc/php5/conf.d/apcu.ini, /etc/php5/conf.d/ctype.ini, /etc/php5/conf.d/curl.ini, /etc/php5/conf.d/dom.ini, /etc/php5/conf.d/fileinfo.ini, /etc/php5/conf.d/ftp.ini, /etc/php5/conf.d/gd.ini, /etc/php5/conf.d/gmp.ini, /etc/php5/conf.d/iconv.ini, /etc/php5/conf.d/json.ini, /etc/php5/conf.d/ldap.ini, /etc/php5/conf.d/libsmbclient.ini, /etc/php5/conf.d/mbstring.ini, /etc/php5/conf.d/mysql.ini, /etc/php5/conf.d/mysqli.ini, /etc/php5/conf.d/odbc.ini, /etc/php5/conf.d/openssl.ini, /etc/php5/conf.d/pdo.ini, /etc/php5/conf.d/pdo_mysql.ini, /etc/php5/conf.d/pdo_odbc.ini, /etc/php5/conf.d/posix.ini, /etc/php5/conf.d/soap.ini, /etc/php5/conf.d/xmlreader.ini, /etc/php5/conf.d/xmlwriter.ini, /etc/php5/conf.d/zendguardloader.ini, /etc/php5/conf.d/zip.ini, /etc/php5/conf.d/zlib.ini
PHP API 20100412
PHP Extension 20100525
Zend Extension 220100525
Zend Extension Build API220100525,NTS
PHP Extension Build API20100525,NTS
Debug Build no
Thread Safety disabled
Zend Signal Handling disabled
Zend Memory Manager enabled
Zend Multibyte Support provided by mbstring
IPv6 Support enabled
DTrace Support disabled
Registered PHP Streams php, file, glob, data, http, ftp, https, ftps, zip, compress.zlib
Registered Stream Socket Transports tcp, udp, unix, udg, ssl, sslv3, sslv2, tls
Registered Stream Filters string.rot13, string.toupper, string.tolower, string.strip_tags, convert., consumed, dechunk, convert.iconv., zlib.*

[LukasReschke]

@blizzz FYI

[karlitschek]

Arggghhh. Thanks @MTRichards for testing this. We still support 5.4

[LukasReschke]

Arggghhh. Thanks @MTRichards for testing this. We still support 5.4

On a related note this could have been detected automatically. @cmonteroluque this is related to my mail (from some time ago) about manual testing before a release.

PHPStorm is quite able to spot this:

Can we please make sure that this gets added to the release checklist? We can't just really hope that somebody will hopefully trigger the incompatible code path on an incompatible version in the RC phase. This happened too often already.

[LukasReschke]

=> #19795

[ghost]

@LukasReschke got it. Thanks!

[MorrisJobke]

This one is fixed in stable8.2: #19796

[nickvergessen]

Reopening until it is fixed in 9.0

[MorrisJobke]

Reopening until it is fixed in 9.0

It's only a merge away ;)

[ghost]

ok, moving it to 9.0

[LukasReschke]

@cmonteroluque if you press merge at "#19797" we can also close this ;)

[MorrisJobke]

Was merged by @DeepDiver1975 -> I will move this to 8.2 so that we know that the fix for this is in 8.2 and upwards and not think that it only was included in 9.0 (there is no brown label for the .0 releases and I don't want to introduce it for one ticket.