On Friday 05 July 2013 04:01:04 Jekyll Wu wrote:
> https://bugs.kde.org/show_bug.cgi?id=321759
> 
> Actually, I have noticed a few similar 'crash' reports (bug 321931,
> bug 321972, bug 321954) created recently, and all of them are from
> Ubuntu systems.

There are two issues here:

1. The application somehow issued an X error, most probably when 
trying to get X window properties of an already closed window. Might 
be an issue in KDE, see multiple backtraces containing 
NETWinInfo::update[1] or XGetWindowProperty[2]

2. GDK installs a deadly X error handler, causing the application to 
exit, instead of "just" printing an error message. See multiple 
backtraces containing gdk_x_error[3]

Even if the first issue got fixed, I consider the second issue rather 
critical, and suggest to not call a previously installed X error 
handler. Comments?

[1]
https://bugs.kde.org/buglist.cgi?query_format=advanced&long_desc_type=substring&long_desc=NETWinInfo%3A%3Aupdate&bug_status=UNCONFIRMED&bug_status=CONFIRMED&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=NEEDSINFO&bug_severity=crash&list_id=697586
[2] 
https://bugs.kde.org/buglist.cgi?query_format=advanced&long_desc_type=substring&long_desc=XGetWindowProperty&bug_status=UNCONFIRMED&bug_status=CONFIRMED&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=NEEDSINFO&bug_severity=crash&list_id=697585
[3]
https://bugs.kde.org/buglist.cgi?query_format=advanced&long_desc_type=substring&long_desc=gdk_x_error&bug_status=UNCONFIRMED&bug_status=CONFIRMED&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=NEEDSINFO&bug_severity=crash&list_id=697588

Christoph Feck (kdepepo)
KDE Quality Team