Created attachment 123524 [details]
Patch 1/1

If activate_ready() fires during another poll, it will loose the source id of
the old poll:

  ModemManager[12444]: <debug> [1462470508.486898] [mm-port-serial.c:1288] mm_port_serial_open(): (ttyACM0) device open count is 2 (open)
  ModemManager[12444]: <debug> [1462470508.486949] [mm-port-serial-at.c:459] debug_log(): (ttyACM0): --> 'AT*ENAP?<CR>'
  ModemManager[12444]: <debug> [1462470508.499707] [mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR><LF>*ENAP:2,""<CR><LF>'
  ModemManager[12444]: <debug> [1462470508.500711] [mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
  ModemManager[12444]: <debug> [1462470508.500785] [mm-port-serial.c:1345] _close_internal(): (ttyACM0) device open count is 1 (close)
  ModemManager[12444]: <debug> [1462470509.486911] [mm-port-serial.c:1288] mm_port_serial_open(): (ttyACM0) device open count is 2 (open)
  ModemManager[12444]: <debug> [1462470509.486991] [mm-port-serial-at.c:459] debug_log(): (ttyACM0): --> 'AT*ENAP?<CR>'
  ModemManager[12444]: <debug> [1462470509.489002] [mm-base-bearer.c:874] mm_base_bearer_disconnect(): Disconnecting bearer '/org/freedesktop/ModemManager1/Bearer/83'
  ModemManager[12444]: <info>  [1462470509.489058] [mm-iface-modem.c:1431] __iface_modem_update_state_internal(): Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> disconnecting)

  (ModemManager:12444): GLib-CRITICAL **: g_source_remove: assertion 'tag > 0' failed
  [Thread 0x7ffff3ba3700 (LWP 12449) exited]

  Program received signal SIGTRAP, Trace/breakpoint trap.
  g_logv (log_domain=0x7ffff6ab502e "GLib", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7fffffffd4b0) at gmessages.c:1046
  1046              g_private_set (&g_log_depth, GUINT_TO_POINTER (depth));
  Missing separate debuginfos, use: debuginfo-install libmbim-1.12.4-2.el7.centos.x86_64 libqmi-1.14.2-1.el7.centos.x86_64
  (gdb) bt
  #0  0x00007ffff6a508c3 in g_logv (log_domain=0x7ffff6ab502e "GLib", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7fffffffd4b0) at gmessages.c:1046
  #1  0x00007ffff6a50a3f in g_log (log_domain=log_domain@entry=0x7ffff6ab502e "GLib", log_level=log_level@entry=G_LOG_LEVEL_CRITICAL, format=format@entry=0x7ffff6abe73d "%s: assertion '%s' failed") at gmessages.c:1079
  #2  0x00007ffff6a50a79 in g_return_if_fail_warning (log_domain=log_domain@entry=0x7ffff6ab502e "GLib", pretty_function=pretty_function@entry=0x7ffff6abcbb0 <__FUNCTION__.12326> "g_source_remove", expression=expression@entry=0x7ffff6abc040 "tag > 0") at gmessages.c:1088
  #3  0x00007ffff6a485fa in g_source_remove (tag=<optimized out>) at gmain.c:2235
  #4  0x00007ffff237e9a1 in connect_cancelled_cb (cancellable=0x7fffe4011480 [GCancellable], self=0x7fffe40087a0 [MMBroadbandBearerMbm]) at mbm/mm-broadband-bearer-mbm.c:188
  #5  0x00007ffff6d47067 in _g_closure_invoke_va (closure=closure@entry=0x555555934540, return_value=return_value@entry=0x0, instance=instance@entry=0x7fffe4011480, args=args@entry=0x7fffffffd7a0, n_params=0, param_types=0x0) at gclosure.c:831
  #6  0x00007ffff6d5fb27 in g_signal_emit_valist (instance=0x7fffe4011480, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffd7a0) at gsignal.c:3218
  #7  0x00007ffff6d6077f in g_signal_emit (instance=instance@entry=0x7fffe4011480, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3365
  #8  0x00007ffff6fc0425 in g_cancellable_cancel (cancellable=0x7fffe4011480 [GCancellable]) at gcancellable.c:508
  #9  0x000055555559c372 in mm_base_bearer_disconnect (self=0x7fffe40087a0 [MMBroadbandBearerMbm], callback=0x55555559c430 <handle_disconnect_ready>, user_data=0x555555928100) at mm-base-bearer.c:883
  #10 0x000055555559c534 in handle_disconnect_auth_ready (modem=0x5555559002b0 [MMBroadbandModemMbm], res=0x55555591e110, ctx=0x555555928100) at mm-base-bearer.c:947
  #11 0x00007ffff6ff9f47 in g_simple_async_result_complete (simple=0x55555591e110 [GSimpleAsyncResult]) at gsimpleasyncresult.c:763
  #12 0x00005555555a737a in authorize_ready (authp=0x5555558a4480 [MMAuthProvider], res=0x7fffe400b160, simple=0x55555591e110 [GSimpleAsyncResult]) at mm-base-modem.c:1161
  #13 0x00007ffff6ff9f47 in g_simple_async_result_complete (simple=0x7fffe400b160 [GSimpleAsyncResult]) at gsimpleasyncresult.c:763
  #14 0x00007ffff6ff9fa9 in complete_in_idle_cb (data=<optimized out>) at gsimpleasyncresult.c:775
  #15 0x00007ffff6a4979a in g_main_context_dispatch (context=0x5555558a4a00) at gmain.c:3109
  #16 0x00007ffff6a4979a in g_main_context_dispatch (context=context@entry=0x5555558a4a00) at gmain.c:3708
  #17 0x00007ffff6a49ae8 in g_main_context_iterate (context=0x5555558a4a00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3779
  #18 0x00007ffff6a49dba in g_main_loop_run (loop=0x5555558a4130) at gmain.c:3973
  #19 0x000055555558d068 in main (argc=2, argv=0x7fffffffdc38) at main.c:181
  (gdb)