Also, the debuginfo packages of systemd isn't up to date:

[root@TesterTop4 ocrete]# rpm -q systemd
systemd-44-8.fc17.x86_64
systemd-44-8.fc17.i686
[root@TesterTop4 ocrete]# rpm -q systemd-debuginfo
systemd-debuginfo-44-7.fc17.x86_64

[ocrete@TesterTop4 ~]$ gdb --args systemd-loginctl kill-session 7
GNU gdb (GDB) Fedora (7.4.50.20120120-42.fc17)
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/systemd-loginctl...
warning: the debug information found in "/usr/lib/debug//usr/bin/systemd-loginctl.debug" does not match "/usr/bin/systemd-loginctl" (CRC mismatch).


warning: the debug information found in "/usr/lib/debug/usr/bin/systemd-loginctl.debug" does not match "/usr/bin/systemd-loginctl" (CRC mismatch).

(no debugging symbols found)...done.
Missing separate debuginfos, use: debuginfo-install systemd-44-8.fc17.i686 systemd-44-8.fc17.x86_64
(gdb) r
Starting program: /usr/bin/systemd-loginctl kill-session 7
warning: the debug information found in "/usr/lib/debug//lib64/ld-2.15.so.debug" does not match "/lib64/ld-linux-x86-64.so.2" (CRC mismatch).

warning: the debug information found in "/usr/lib/debug//lib64/libpthread-2.15.so.debug" does not match "/lib64/libpthread.so.0" (CRC mismatch).

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
warning: the debug information found in "/usr/lib/debug//lib64/librt-2.15.so.debug" does not match "/lib64/librt.so.1" (CRC mismatch).

warning: the debug information found in "/usr/lib/debug//lib64/libc-2.15.so.debug" does not match "/lib64/libc.so.6" (CRC mismatch).

warning: the debug information found in "/usr/lib/debug//lib64/libdl-2.15.so.debug" does not match "/lib64/libdl.so.2" (CRC mismatch).


Program received signal SIGSEGV, Segmentation fault.
_dbus_marshal_write_basic (str=0x6140c0, insert_at=16, type=type@entry=105, value=value@entry=0x7fff0000000f, 
    byte_order=108, pos_after=pos_after@entry=0x7fffffffde10) at dbus-marshal-basic.c:846
846	      return marshal_4_octets (str, insert_at, vp->u32,
(gdb) bt full
#0  _dbus_marshal_write_basic (str=0x6140c0, insert_at=16, type=type@entry=105, value=value@entry=0x7fff0000000f, 
    byte_order=108, pos_after=pos_after@entry=0x7fffffffde10) at dbus-marshal-basic.c:846
        vp = <optimized out>
#1  0x00007ffff7789da1 in _dbus_type_writer_write_basic_no_typecode (value=0x7fff0000000f, type=105, 
    writer=0x7fffffffddf0) at dbus-marshal-recursive.c:1589
No locals.
#2  _dbus_type_writer_write_basic_no_typecode (value=0x7fff0000000f, type=105, writer=0x7fffffffddf0)
    at dbus-marshal-recursive.c:2296
No locals.
#3  _dbus_type_writer_write_basic (writer=writer@entry=0x7fffffffddf0, type=type@entry=105, 
    value=value@entry=0x7fff0000000f) at dbus-marshal-recursive.c:2311
        retval = 0
#4  0x00007ffff778d929 in dbus_message_iter_append_basic (iter=iter@entry=0x7fffffffdde0, type=type@entry=105, 
    value=0x7fff0000000f) at dbus-message.c:2596
        real = 0x7fffffffdde0
        ret = <optimized out>
        __FUNCTION__ = "dbus_message_iter_append_basic"
#5  0x00007ffff778e17e in dbus_message_append_args_valist (message=<optimized out>, first_arg_type=<optimized out>, 
    var_args=var_args@entry=0x7fffffffdeb8) at dbus-message.c:1694
        value = <optimized out>
        type = 105
        iter = {dummy1 = 0x614070, dummy2 = 0x7fff01e00000, dummy3 = 131180, dummy4 = 0, dummy5 = 6371584, dummy6 = 0, 
          dummy7 = 2, dummy8 = 32767, dummy9 = 6373568, dummy10 = 0, dummy11 = 16, pad1 = 32767, pad2 = -136400156, 
          pad3 = 0x1}
        __FUNCTION__ = "dbus_message_append_args_valist"
#6  0x00007ffff778e4dc in dbus_message_append_args (message=<optimized out>, first_arg_type=<optimized out>)
    at dbus-message.c:1652
        retval = <optimized out>
        var_args = {{gp_offset = 48, fp_offset = 48, overflow_arg_area = 0x7fffffffdf98, reg_save_area = 0x7fffffffded0}}
        __FUNCTION__ = "dbus_message_append_args"
#7  0x0000000000403ad4 in ?? ()
No symbol table info available.
#8  0x00000000004032b0 in ?? ()
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#9  0x00007ffff6dac735 in __libc_start_main () from /lib64/libc.so.6
No symbol table info available.
#10 0x000000000040344d in ?? ()
No symbol table info available.
#11 0x00007fffffffe138 in ?? ()
No symbol table info available.
#12 0x000000000000001c in ?? ()
No symbol table info available.
#13 0x0000000000000003 in ?? ()
No symbol table info available.
#14 0x00007fffffffe446 in ?? ()
No symbol table info available.
#15 0x00007fffffffe460 in ?? ()
No symbol table info available.
#16 0x00007fffffffe46d in ?? ()
No symbol table info available.
#17 0x0000000000000000 in ?? ()
No symbol table info available.
(gdb)