Segementation Fault roundcube calendar

[Thomas Baumann]

Hello all,

how can this segementation fault and calendar problem being debugged?

Apache-Errorlog says

QFile::remove: Empty or null file name
unnamed app(23656) KSystemTimeZonesPrivate::readConfig: readConfig(): local
zone= "UTC"
unnamed app(23656) KSystemTimeZonesPrivate::readZoneTab: readZoneTab(
"/usr/share/zoneinfo/zone.tab" )
[Mon Nov 17 13:33:06 2014] [error] [client 192.168.191.4] PHP Fatal error:
 Allowed memory size of 536870912 bytes exhausted (tried to allocate 71
bytes) in
/usr/share/roundcubemail/plugins/calendar/drivers/kolab/kolab_calendar.php
on line 326, referer:
http://mail.mydomain.de/roundcubemail/55b1b19624d4ddec/?_task=mail&_action=show&_uid=21176&_mbox=INBOX&_caps=pdf%3D1%2Cflash%3D1%2Ctif%3D1
[Mon Nov 17 13:33:06 2014] [error] [client 192.168.191.4] PHP Fatal error:
 Call to undefined method PDOStatement::gc_shutdown() in Unknown on line 0,
referer:
http://mail.mydomain.de/roundcubemail/55b1b19624d4ddec/?_task=mail&_action=show&_uid=21176&_mbox=INBOX&_caps=pdf%3D1%2Cflash%3D1%2Ctif%3D1
[Mon Nov 17 13:41:15 2014] [error] [client 192.168.191.4] PHP Fatal error:
 Allowed memory size of 536870912 bytes exhausted (tried to allocate 71
bytes) in
/usr/share/roundcubemail/plugins/calendar/drivers/kolab/kolab_calendar.php
on line 326, referer:
http://mail.mydomain.de/roundcubemail/55b1b19624d4ddec/?_task=mail&_action=show&_uid=21176&_mbox=INBOX&_caps=pdf%3D1%2Cflash%3D1%2Ctif%3D1
[Mon Nov 17 13:41:16 2014] [notice] child pid 23661 exit signal
Segmentation fault (11)


Best regards and thanks for your help in advance.
Thomas.
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