...same as in session 1...
Loaded symbols for /usr/lib/libxfce4menu-0.1.so.0
0x00007faa169b6743 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=5000)
    at ../sysdeps/unix/sysv/linux/poll.c:87
87      ../sysdeps/unix/sysv/linux/poll.c: Datei oder Verzeichnis nicht gefunden.
        in ../sysdeps/unix/sysv/linux/poll.c
(gdb) break gdk_x_error
Function "gdk_x_error" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (gdk_x_error) pending.
(gdb) run --sync
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/bin/xfdesktop --sync
[Thread debugging using libthread_db enabled]
xfdesktop[12688] is already running; assuming --reload
xfdesktop[12688]: starting up

Program exited normally.
(gdb)