Wierd crash - Need help to locate the problem from this GDB info

(gdb) up
#1  0x002e1b10 in raise () from /lib/libc.so.6
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#2  0x002e3421 in abort () from /lib/libc.so.6
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#3  0x080f30dd in char_from_room (ch=0xa82bc30) at handler.c:395
395         abort();
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#4  0x080ca48d in do_mteleport (ch=0xa6c66d8, argument=0xbf89b7ad "  }722 2311", cmd=0, subcmd=0) at dg_mobcmd.c:615
615           char_from_room(vict);
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#5  0x08105246 in script_command_interpreter (ch=0xa6c66d8, arg=0xbf89b7a4 "mteleport  }722 2311") at interpreter.c:510
510       ((*mob_script_commands[i].command_pointer) (ch, line, 0,
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#6  0x080d604c in script_driver (go_adress=0xbf89ba68, trig=0xa6c68b0, type=0, mode=1) at dg_scripts.c:2670
2670                if (!script_command_interpreter((char_data *) go, cmd))
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#7  0x080d6152 in trig_wait_event (event_obj=0xad84b70) at dg_scripts.c:757
757       script_driver(&go, trig, type, TRIG_RESTART);
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#8  0x080c827a in event_process () at dg_event.c:126
126         if ((new_time = (the_event->func)(the_event->event_obj)) > 0)
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#9  0x080b6531 in heartbeat (heart_pulse=393536) at comm.c:974
974       event_process();
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#10 0x080b98c8 in game_loop (local_mother_desc=3) at comm.c:941
941           heartbeat(++pulse);
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#11 0x080bb487 in init_game (argc=Cannot access memory at address 0x46a
) at comm.c:536
536       game_loop(mother_desc);
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#12 main (argc=Cannot access memory at address 0x46a
) at comm.c:356
356         init_game(port);

Trigger Intended Assignment: Mobiles
Trigger Type: Greet-All , Numeric Arg: 100, Arg list: None
Commands:
if %actor.class% != Thief
  wait 1 sec
  %send% %actor% %self.name% ...
  %echoaround% %actor% %self.name% ... %actor.name% ...
  wait 1 sec
  %asound% %actor.name% ...
  %teleport% %actor% 2311
  %force% %actor% look
else
  wait 1 sec
  emote ...
  say bla bla
end

  if (!str_cmp(arg1, "all")) {
    if (target == IN_ROOM(ch)) {
      mob_log(ch, "mteleport all target is itself");
      return;
    }

    for (vict = world[IN_ROOM(ch)].people; vict; vict = next_ch) {
      next_ch = vict->next_in_room;

      if (valid_dg_target(vict, DG_ALLOW_GODS)) {
        char_from_room(vict);
        char_to_room(vict, target);
        enter_wtrigger(&world[IN_ROOM(ch)], ch, -1);
      }
    }
  } else {
    if (*arg1 == UID_CHAR) {
      if (!(vict = get_char(arg1))) {
        mob_log(ch, "mteleport: victim (%s) does not exist",arg1);
        return;
      }
    } else if (!(vict = get_char_vis(ch, arg1, NULL, FIND_CHAR_WORLD))) {
      mob_log(ch, "mteleport: victim (%s) does not exist",arg1);
      return;
    }

    if (valid_dg_target(ch, DG_ALLOW_GODS)) {
      char_from_room(vict);
      char_to_room(vict, target);
      enter_wtrigger(&world[IN_ROOM(ch)], ch, -1);
    }
  }
}