.
Thread 1 (process 5880):
#0  0xb7e6b2f7 in ?? () from /usr/lib/libpolkit.so.2
#1  0xb7e761b0 in _internal_foreach (authdb=0x9113048, 
    action=<value optimized out>, uid=0, 
    cb=0xb7e759b0 <_check_auth_for_session>, user_data=0xbfd6aaa4, error=0x0)
    at polkit-authorization-db.c:438
	l = <value optimized out>
	auths = (KitList *) 0x0
	auths_copy = <value optimized out>
	ret = <value optimized out>
	action_id = 0x0
	__PRETTY_FUNCTION__ = "_internal_foreach"
#2  0xb7e768b8 in polkit_authorization_db_is_session_authorized (
    authdb=0x9113048, action=0x91171e0, session=0x9117378, 
    out_is_authorized=0xbfd6aaf8, out_is_negative_authorized=0xbfd6aaf4, 
    error=0x0) at polkit-authorization-db.c:779
	ret = <value optimized out>
	cd = {
  action_id = 0x911ea80 "org.freedesktop.hal.device-access.modem", 
  session_uid = 0, 
  session_objpath = 0x9113e60 "/org/freedesktop/ConsoleKit/Session12", 
  session = 0x9117378, out_is_authorized = 0xbfd6aaf8, 
  out_is_negative_authorized = 0xbfd6aaf4}
	__PRETTY_FUNCTION__ = "polkit_authorization_db_is_session_authorized"
#3  0xb7e6d184 in polkit_context_is_session_authorized (pk_context=0x9113008, 
    action=0x91171e0, session=0x9117378, error=0x0) at polkit-context.c:779
	cache = (PolKitPolicyCache *) 0x9113610
	result_from_config = POLKIT_RESULT_YES
	result_from_grantdb = <value optimized out>
	from_authdb = <value optimized out>
	from_authdb_negative = 0
	result = <value optimized out>
	config = <value optimized out>
	__PRETTY_FUNCTION__ = "polkit_context_is_session_authorized"
#4  0xb7e6d303 in polkit_context_can_session_do_action (pk_context=0x9113008, 
    action=0x91171e0, session=0x9117378) at polkit-context.c:1003
No locals.
#5  0x0804ac15 in acl_device_added_visitor (
    seat_id=0x9113d78 "/org/freedesktop/ConsoleKit/Seat1", 
    num_sessions_on_seat=2, 
    session_id=0x9113970 "/org/freedesktop/ConsoleKit/Session12", 
    session_uid=0, session_is_local=1, session_is_active=0, 
    user_data=0x9116c40) at hal-acl-tool.c:782
	pk_result = <value optimized out>
	pk_seat = <value optimized out>
	pk_session = (PolKitSession *) 0x9117378
	pk_action = (PolKitAction *) 0x91171e0
	i = (GSList *) 0x9116ba0
#6  0x08049e87 in visit_seats_and_sessions (
    visitor_cb=0x804ab10 <acl_device_added_visitor>, user_data=0x9116c40)
    at hal-acl-tool.c:528
	endptr = 0xbfd6be37 ""
	seat_id = 0x9113d78 "/org/freedesktop/ConsoleKit/Seat1"
	sessions = (char **) 0x9116100
	num_sessions_on_seat = 2
	s = <value optimized out>
	seats = (char **) 0x9116dc8
	ret = <value optimized out>
#7  0x0804b27a in main (argc=) at hal-acl-tool.c:1107
	p_error = (PolKitError *) 0x0