#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
  [Error: raise.c was not found in source tree]
#1  0x00007f40479033ea in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#2  0x00007f4047d04665 in g_assertion_message () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4047d046fa in g_assertion_message_expr () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00005609d9b7dea4 in on_shutdown_prepared (system=0x5609db7ec8a0, success=1, manager=0x5609db806100) at gsm-manager.c:3680
  3675:         g_debug ("GsmManager: on_shutdown_prepared, success: %d", success);
  3676:         g_signal_handlers_disconnect_by_func (system, on_shutdown_prepared, manager);
  3677: 
  3678:         if (success) {
  3679:                 /* move to end-session phase */
  3680:                 g_assert (manager->priv->phase == GSM_MANAGER_PHASE_QUERY_END_SESSION);
  3681:                 manager->priv->phase++;
  3682:                 start_phase (manager);
  3683:         } else {
  3684:                 disconnect_shell_dialog_signals (manager);
  3685:                 gsm_shell_close_end_session_dialog (manager->priv->shell);
#5  0x00007f4047fb6f75 in g_closure_invoke () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6  0x00007f4047fc8f82 in signal_emit_unlocked_R () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7  0x00007f4047fd1bdc in g_signal_emit_valist () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8  0x00007f4047fd246b in g_signal_emit_by_name () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9  0x00005609d9b74424 in sd_proxy_signal_cb (proxy=<optimized out>, sender_name=<optimized out>, signal_name=0x5609db891c40 "PrepareForShutdown", parameters=0x5609db84f4f0, user_data=0x5609db7ec8a0) at gsm-systemd.c:943
  938:                 return;
  939:         }
  940: 
  941:         if (systemd->priv->prepare_for_shutdown_expected) {
  942:                 g_debug ("GsmSystemd: shutdown successfully prepared");
  943:                 g_signal_emit_by_name (systemd, "shutdown-prepared", TRUE);
  944:                 systemd->priv->prepare_for_shutdown_expected = FALSE;
  945:         }
  946: }
  947: 
  948: #else
#10 0x00007f404470ce18 in ffi_call_unix64 () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libffi.so.6
#11 0x00007f404470c87a in ffi_call () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libffi.so.6
#12 0x00007f4047fb77ae in g_cclosure_marshal_generic () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#13 0x00007f4047fb6f75 in g_closure_invoke () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007f4047fc8f82 in signal_emit_unlocked_R () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x00007f4047fd1bdc in g_signal_emit_valist () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007f4047fd1fbf in g_signal_emit () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007f40482c23cc in on_signal_received () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#18 0x00007f40482b1d64 in emit_signal_instance_in_idle_cb () from /tmp/apport_sandbox_fF_HZI/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#19 0x00007f4047cdd75a in g_main_context_dispatch () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f4047cddb10 in g_main_context_iterate.isra () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f4047cdde32 in g_main_loop_run () from /tmp/apport_sandbox_fF_HZI/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00005609d9b5ec1f in main (argc=<optimized out>, argv=<optimized out>) at main.c:439