#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
  [Error: raise.c was not found in source tree]
#1  0x00007ffa516a4801 in __GI_abort () at abort.c:79
  [Error: abort.c was not found in source tree]
#2  0x00007ffa58ef2fa5 in g_assertion_message (domain=domain@entry=0x55d838663e44 "Gvc", file=file@entry=0x55d838665678 "../subprojects/gvc/gvc-mixer-control.c", line=line@entry=547, func=func@entry=0x55d838666ba0 <__func__.29306> "gvc_mixer_control_change_profile_on_selected_device", message=message@entry=0x55d83a5cc570 "assertion failed: (best_profile)") at ../../../../glib/gtestutils.c:2532
  [Error: gtestutils.c was not found in source tree]
#3  0x00007ffa58ef300a in g_assertion_message_expr (domain=domain@entry=0x55d838663e44 "Gvc", file=file@entry=0x55d838665678 "../subprojects/gvc/gvc-mixer-control.c", line=line@entry=547, func=func@entry=0x55d838666ba0 <__func__.29306> "gvc_mixer_control_change_profile_on_selected_device", expr=expr@entry=0x55d83866691a "best_profile") at ../../../../glib/gtestutils.c:2555
  [Error: gtestutils.c was not found in source tree]
#4  0x000055d8385ee5f6 in gvc_mixer_control_change_profile_on_selected_device (control=0x55d83a76eab0, device=0x55d83a655700, profile=0x0) at ../subprojects/gvc/gvc-mixer-control.c:547
  542:         if (current_profile)
  543:                 best_profile = gvc_mixer_ui_device_get_best_profile (device, profile, current_profile->profile);
  544:         else
  545:                 best_profile = profile;
  546: 
  547:         g_assert (best_profile);
  548: 
  549:         g_debug ("Selected '%s', moving to profile '%s' on card '%s' on stream id %i",
  550:                 profile ? profile : "(any)", best_profile,
  551:                 gvc_mixer_card_get_name (card),
  552:                 gvc_mixer_ui_device_get_stream_id (device));
#5  0x000055d8385d8076 in on_output_selection_changed (selection=0x7ffa20005fa0, dialog=0x55d83a594130) at ../panels/sound/gvc-mixer-dialog.c:1464
  1459:         if (output == NULL) {
  1460:                 g_warning ("Unable to find output with id: %u", id);
  1461:                 return;
  1462:         }
  1463: 
  1464:         gvc_mixer_control_change_output (dialog->mixer_control, output);
  1465: }
  1466: 
  1467: static GtkWidget *
  1468: create_ui_device_treeview (GvcMixerDialog *dialog,
  1469:                            GCallback       on_selection_changed)
#6  0x00007ffa591a61a6 in ?? () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7  0x00007ffa591c16df in g_signal_emit_valist () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8  0x00007ffa591c1e0f in g_signal_emit () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9  0x00007ffa588d8568 in gtk_tree_view_real_set_cursor (tree_view=tree_view@entry=0x55d83a6647f0, path=path@entry=0x55d83a5a2e10, flags=flags@entry=(CLEAR_AND_SELECT | CLAMP_NODE)) at ../../../../gtk/gtktreeview.c:13306
  [Error: gtktreeview.c was not found in source tree]
#10 0x00007ffa588df889 in gtk_tree_view_multipress_gesture_pressed (gesture=0x55d83a76eb80, n_press=1, x=<optimized out>, y=<optimized out>, tree_view=0x55d83a6647f0) at ../../../../gtk/gtktreeview.c:3379
  [Error: gtktreeview.c was not found in source tree]
#11 0x00007ffa509a9dae in ffi_call_unix64 () at ../src/x86/unix64.S:76
  [Error: unix64.S was not found in source tree]
#12 0x00007ffa509a971f in ffi_call (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>) at ../src/x86/ffi64.c:525
  [Error: ffi64.c was not found in source tree]
#13 0x00007ffa591a6b4d in g_cclosure_marshal_generic_va () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007ffa591a61a6 in ?? () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x00007ffa591c16df in g_signal_emit_valist () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007ffa591c1e0f in g_signal_emit () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007ffa587619cc in gtk_gesture_multi_press_begin (gesture=0x55d83a76eb80, sequence=<optimized out>) at ../../../../gtk/gtkgesturemultipress.c:241
  [Error: gtkgesturemultipress.c was not found in source tree]
#18 0x00007ffa591a8e68 in g_cclosure_marshal_VOID__BOXEDv () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#19 0x00007ffa591a61a6 in ?? () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#20 0x00007ffa591c16df in g_signal_emit_valist () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#21 0x00007ffa591c1e0f in g_signal_emit () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#22 0x00007ffa5875e95e in _gtk_gesture_set_recognized (sequence=0x0, recognized=1, gesture=0x55d83a76eb80) at ../../../../gtk/gtkgesture.c:343
  [Error: gtkgesture.c was not found in source tree]
#23 _gtk_gesture_check_recognized (gesture=gesture@entry=0x55d83a76eb80, sequence=sequence@entry=0x0) at ../../../../gtk/gtkgesture.c:389
  [Error: gtkgesture.c was not found in source tree]
#24 0x00007ffa5875feab in gtk_gesture_handle_event (controller=0x55d83a76eb80, event=0x7ffa1c003e70) at ../../../../gtk/gtkgesture.c:747
  [Error: gtkgesture.c was not found in source tree]
#25 0x00007ffa58762b6e in gtk_gesture_single_handle_event (controller=0x55d83a76eb80, event=0x7ffa1c003e70) at ../../../../gtk/gtkgesturesingle.c:222
  [Error: gtkgesturesingle.c was not found in source tree]
#26 0x00007ffa587303b1 in gtk_event_controller_handle_event (controller=0x55d83a76eb80, event=event@entry=0x7ffa1c003e70) at ../../../../gtk/gtkeventcontroller.c:230
  [Error: gtkeventcontroller.c was not found in source tree]
#27 0x00007ffa588efbfb in _gtk_widget_run_controllers (widget=0x55d83a6647f0, event=0x7ffa1c003e70, phase=GTK_PHASE_BUBBLE) at ../../../../gtk/gtkwidget.c:7375
  [Error: gtkwidget.c was not found in source tree]
#28 0x00007ffa587aa427 in _gtk_marshal_BOOLEAN__BOXEDv (closure=0x55d839f985c0, return_value=0x7ffe011bea40, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x55d839f985f0) at ../../../../gtk/gtkmarshalers.c:128
  [Error: gtkmarshalers.c was not found in source tree]
#29 0x00007ffa591a61a6 in ?? () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#30 0x00007ffa591c10ad in g_signal_emit_valist () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#31 0x00007ffa591c1e0f in g_signal_emit () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#32 0x00007ffa588f1e94 in gtk_widget_event_internal (widget=widget@entry=0x55d83a6647f0, event=event@entry=0x7ffa1c003e70) at ../../../../gtk/gtkwidget.c:7740
  [Error: gtkwidget.c was not found in source tree]
#33 0x00007ffa588f3f0a in gtk_widget_event (widget=widget@entry=0x55d83a6647f0, event=event@entry=0x7ffa1c003e70) at ../../../../gtk/gtkwidget.c:7310
  [Error: gtkwidget.c was not found in source tree]
#34 0x00007ffa587a739e in propagate_event_up (topmost=<optimized out>, event=<optimized out>, widget=0x55d83a6647f0) at ../../../../gtk/gtkmain.c:2592
  [Error: gtkmain.c was not found in source tree]
#35 propagate_event (widget=<optimized out>, event=0x7ffa1c003e70, captured=<optimized out>, topmost=0x0) at ../../../../gtk/gtkmain.c:2694
  [Error: gtkmain.c was not found in source tree]
#36 0x00007ffa587a9478 in gtk_main_do_event (event=<optimized out>) at ../../../../gtk/gtkmain.c:1915
  [Error: gtkmain.c was not found in source tree]
#37 0x00007ffa582bb9a5 in _gdk_event_emit (event=event@entry=0x7ffa1c003e70) at ../../../../gdk/gdkevents.c:73
  [Error: gdkevents.c was not found in source tree]
#38 0x00007ffa582ec2e2 in gdk_event_source_dispatch (source=source@entry=0x55d839f7eec0, callback=<optimized out>, user_data=<optimized out>) at ../../../../../gdk/x11/gdkeventsource.c:367
  [Error: gdkeventsource.c was not found in source tree]
#39 0x00007ffa58ecc287 in g_main_dispatch (context=0x55d839f7efb0) at ../../../../glib/gmain.c:3177
  [Error: gmain.c was not found in source tree]
#40 g_main_context_dispatch (context=context@entry=0x55d839f7efb0) at ../../../../glib/gmain.c:3830
  [Error: gmain.c was not found in source tree]
#41 0x00007ffa58ecc4c0 in g_main_context_iterate (context=context@entry=0x55d839f7efb0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3903
  [Error: gmain.c was not found in source tree]
#42 0x00007ffa58ecc54c in g_main_context_iteration (context=0x55d839f7efb0, may_block=1) at ../../../../glib/gmain.c:3964
  [Error: gmain.c was not found in source tree]
#43 0x00007ffa5948cd0d in g_application_run () from /tmp/apport_sandbox_kgvmh5ip/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#44 0x000055d838555b31 in main (argc=<optimized out>, argv=<optimized out>) at ../shell/main.c:57
  52:   cheese_gtk_init (&argc, &argv);
  53: #endif /* HAVE_CHEESE */
  54: 
  55:   application = cc_application_new ();
  56: 
  57:   return g_application_run (G_APPLICATION (application), argc, argv);
  58: }