#0  0x00007f51387e5f77 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#1  0x00007f51387e95e8 in __GI_abort () at abort.c:90
  [Error: abort.c was not found in source tree]
#2  0x00007f51388234fb in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f5138936740 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
  [Error: ../sysdeps/unix/sysv/linux/libc_fatal.c was not found in source tree]
#3  0x00007f513882e4c6 in malloc_printerr (action=3, str=0x7f5138936ab8 "munmap_chunk(): invalid pointer", ptr=<optimized out>) at malloc.c:4923
  [Error: malloc.c was not found in source tree]
#4  0x00007f5110061f4d in update_theme (chooser=0x3384db0) at gvc-sound-theme-chooser.c:674
  669:         } else {
  670:                 chooser->priv->current_theme = g_strdup (NO_SOUNDS_THEME_NAME);
  671:         }
  672: 
  673:         if (g_strcmp0 (last_theme, chooser->priv->current_theme) != 0) {
  674:                 g_free (chooser->priv->current_parent);
  675:                 if (load_theme_name (chooser->priv->current_theme,
  676:                                      &chooser->priv->current_parent) == FALSE) {
  677:                         g_free (chooser->priv->current_theme);
  678:                         chooser->priv->current_theme = g_strdup (DEFAULT_THEME);
  679:                         load_theme_name (DEFAULT_THEME,
#5  0x00007f51390a6cf9 in g_cclosure_marshal_VOID__STRINGv (closure=0x33991f0, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x3307560) at /build/buildd/glib2.0-2.38.0/./gobject/gmarshal.c:1004
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gmarshal.c was not found in source tree]
#6  0x00007f51390a43b7 in _g_closure_invoke_va (closure=0x33991f0, return_value=0x0, instance=0x32f4f00, args=0x7fff487c6438, n_params=1, param_types=0x3307560) at /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c:840
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c was not found in source tree]
#7  0x00007f51390bce82 in g_signal_emit_valist (instance=0x32f4f00, signal_id=<optimized out>, detail=4053, var_args=var_args@entry=0x7fff487c6438) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3238
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#8  0x00007f51390bdae2 in g_signal_emit (instance=instance@entry=0x32f4f00, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3386
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#9  0x00007f51397fc40c in g_settings_real_change_event (settings=0x32f4f00, keys=<optimized out>, n_keys=1) at /build/buildd/glib2.0-2.38.0/./gio/gsettings.c:288
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettings.c was not found in source tree]
#10 0x00007f5134dafadc in ffi_call_unix64 () at ../src/x86/unix64.S:76
  [Error: ../src/x86/unix64.S was not found in source tree]
#11 0x00007f5134daf40c in ffi_call (cif=cif@entry=0x7fff487c67b0, fn=0x7f51397fc3a0 <g_settings_real_change_event>, rvalue=0x7fff487c66e0, avalue=avalue@entry=0x7fff487c6680) at ../src/x86/ffi64.c:522
  [Error: ../src/x86/ffi64.c was not found in source tree]
#12 0x00007f51390a4e25 in g_cclosure_marshal_generic_va (closure=0x32f8b40, return_value=0x7fff487c68f0, instance=0x32f4f00, args_list=<optimized out>, marshal_data=0x7f51397fc3a0 <g_settings_real_change_event>, n_params=2, param_types=0x3306d40) at /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c:1550
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c was not found in source tree]
#13 0x00007f51390a43b7 in _g_closure_invoke_va (closure=0x32f8b40, return_value=0x7fff487c68f0, instance=0x32f4f00, args=0x7fff487c69f8, n_params=2, param_types=0x3306d40) at /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c:840
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c was not found in source tree]
#14 0x00007f51390bce82 in g_signal_emit_valist (instance=0x32f4f00, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fff487c69f8) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3238
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#15 0x00007f51390bdae2 in g_signal_emit (instance=instance@entry=0x32f4f00, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3386
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#16 0x00007f51397fc08e in settings_backend_changed (target=0x32f4f00, backend=<optimized out>, key=<optimized out>, origin_tag=<optimized out>) at /build/buildd/glib2.0-2.38.0/./gio/gsettings.c:348
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettings.c was not found in source tree]
#17 0x00007f51397f8a5a in g_settings_backend_invoke_closure (user_data=0x3423b00) at /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c:271
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c was not found in source tree]
#18 0x00007f5138ddc515 in g_main_context_invoke_full (context=0x195b510, priority=0, function=0x7f51397f8a40 <g_settings_backend_invoke_closure>, data=0x3423b00, notify=0x0) at /build/buildd/glib2.0-2.38.0/./glib/gmain.c:5431
  [Error: /build/buildd/glib2.0-2.38.0/./glib/gmain.c was not found in source tree]
#19 0x00007f5138ddc640 in g_main_context_invoke (context=<optimized out>, function=<optimized out>, data=<optimized out>) at /build/buildd/glib2.0-2.38.0/./glib/gmain.c:5392
  [Error: /build/buildd/glib2.0-2.38.0/./glib/gmain.c was not found in source tree]
#20 0x00007f51397f8b47 in g_settings_backend_dispatch_signal (backend=backend@entry=0x32fc450, function_offset=function_offset@entry=0, name=name@entry=0x333df10 "/org/gnome/desktop/sound/theme-name", data1=data1@entry=0x0, data1_copy=0x7f51397f8790 <pointer_id>, data1_copy@entry=0x0, data1_free=0x7f51397f87a0 <pointer_ignore>, data1_free@entry=0x0, data2=data2@entry=0x0) at /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c:353
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c was not found in source tree]
#21 0x00007f51397f903a in g_settings_backend_changed (backend=0x32fc450, key=0x333df10 "/org/gnome/desktop/sound/theme-name", origin_tag=0x0) at /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c:400
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c was not found in source tree]
#22 0x00007f510126221b in ?? () from /tmp/apport_sandbox_vyUdTl/usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#23 0x00007f5101263089 in ?? () from /tmp/apport_sandbox_vyUdTl/usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#24 0x00007f5101261d9b in ?? () from /tmp/apport_sandbox_vyUdTl/usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#25 0x00007f51397f9584 in g_settings_backend_write (backend=0x32fc450, key=key@entry=0x34bfdb0 "/org/gnome/desktop/sound/theme-name", value=value@entry=0x3421aa0, origin_tag=origin_tag@entry=0x0) at /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c:778
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettingsbackend.c was not found in source tree]
#26 0x00007f51397fcbb3 in g_settings_write_to_backend (settings=settings@entry=0x32f4f00, value=value@entry=0x3421aa0, key=0x7fff487c6d00) at /build/buildd/glib2.0-2.38.0/./gio/gsettings.c:1020
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettings.c was not found in source tree]
#27 0x00007f51397fdc93 in g_settings_set_value (settings=0x32f4f00, key=0x7f5110073c44 "theme-name", value=0x3421aa0) at /build/buildd/glib2.0-2.38.0/./gio/gsettings.c:1368
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gsettings.c was not found in source tree]
#28 0x00007f511006191d in update_alert (chooser=chooser@entry=0x3384db0, alert_id=<optimized out>) at gvc-sound-theme-chooser.c:433
  428:         } else if (is_custom && ! is_default) {
  429:                 save_alert_sounds (chooser, alert_id);
  430:         }
  431: 
  432:         if (add_custom) {
  433:                 save_theme_name (chooser, CUSTOM_THEME_NAME);
  434:         } else if (remove_custom) {
  435:                 delete_custom_theme_dir ();
  436:                 if (is_custom) {
  437:                         save_theme_name (chooser, chooser->priv->current_parent);
  438:                 }
#29 0x00007f5110061b17 in on_treeview_selection_changed (selection=<optimized out>, chooser=0x3384db0) at gvc-sound-theme-chooser.c:519
  514:         if (id == NULL) {
  515:                 return;
  516:         }
  517: 
  518:         play_preview_for_id (chooser, id);
  519:         update_alert (chooser, id);
  520:         g_free (id);
  521: }
  522: 
  523: static gboolean
  524: on_treeview_button_pressed (GtkTreeView          *treeview,
#30 0x00007f51390a43b7 in _g_closure_invoke_va (closure=0x333cc40, return_value=0x0, instance=0x335e350, args=0x7fff487c70a8, n_params=0, param_types=0x0) at /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c:840
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c was not found in source tree]
#31 0x00007f51390bce82 in g_signal_emit_valist (instance=0x335e350, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fff487c70a8) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3238
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#32 0x00007f51390bdae2 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3386
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#33 0x00007f513a2fbeff in _gtk_tree_selection_internal_select_node (selection=<optimized out>, node=<optimized out>, tree=<optimized out>, path=path@entry=0x1cac870, mode=<optimized out>, override_browse_mode=override_browse_mode@entry=0) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtktreeselection.c:1604
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtktreeselection.c was not found in source tree]
#34 0x00007f513a31046c in gtk_tree_view_real_set_cursor (tree_view=tree_view@entry=0x1cb1040, path=path@entry=0x1cac870, flags=flags@entry=(CLEAR_AND_SELECT | CLAMP_NODE)) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtktreeview.c:13231
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtktreeview.c was not found in source tree]
#35 0x00007f513a3149d6 in gtk_tree_view_button_press (widget=widget@entry=0x1cb1040, event=0x3433710) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtktreeview.c:3142
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtktreeview.c was not found in source tree]
#36 0x00007f513a20a2cc in _gtk_marshal_BOOLEAN__BOXED (closure=0x1939d10, return_value=0x7fff487c73c0, n_param_values=<optimized out>, param_values=0x7fff487c7470, invocation_hint=<optimized out>, marshal_data=<optimized out>) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmarshalers.c:85
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmarshalers.c was not found in source tree]
#37 0x00007f51390a4188 in g_closure_invoke (closure=0x1939d10, return_value=0x7fff487c73c0, n_param_values=2, param_values=0x7fff487c7470, invocation_hint=0x7fff487c7410) at /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c:777
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gclosure.c was not found in source tree]
#38 0x00007f51390b58db in signal_emit_unlocked_R (node=node@entry=0x1939d60, detail=detail@entry=0, instance=instance@entry=0x1cb1040, emission_return=emission_return@entry=0x7fff487c7540, instance_and_params=instance_and_params@entry=0x7fff487c7470) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3624
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#39 0x00007f51390bd4f9 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff487c7608) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3340
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#40 0x00007f51390bdae2 in g_signal_emit (instance=instance@entry=0x1cb1040, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:3386
  [Error: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c was not found in source tree]
#41 0x00007f513a32b684 in gtk_widget_event_internal (widget=widget@entry=0x1cb1040, event=event@entry=0x3433710) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtkwidget.c:6714
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtkwidget.c was not found in source tree]
#42 0x00007f513a32b959 in gtk_widget_event (widget=widget@entry=0x1cb1040, event=event@entry=0x3433710) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtkwidget.c:6371
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtkwidget.c was not found in source tree]
#43 0x00007f513a2086bc in propagate_event_up (topmost=<optimized out>, event=<optimized out>, widget=0x1cb1040) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmain.c:2399
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmain.c was not found in source tree]
#44 propagate_event (widget=<optimized out>, event=0x3433710, captured=<optimized out>, topmost=0x0) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmain.c:2507
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmain.c was not found in source tree]
#45 0x00007f513a209fa5 in gtk_main_do_event (event=0x3433710) at /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmain.c:1712
  [Error: /build/buildd/gtk+3.0-3.8.4/./gtk/gtkmain.c was not found in source tree]
#46 0x00007f5139b01fa2 in gdk_event_source_dispatch (source=source@entry=0x194b990, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+3.0-3.8.4/./gdk/x11/gdkeventsource.c:364
  [Error: /build/buildd/gtk+3.0-3.8.4/./gdk/x11/gdkeventsource.c was not found in source tree]
#47 0x00007f5138ddb3a6 in g_main_dispatch (context=0x195b510) at /build/buildd/glib2.0-2.38.0/./glib/gmain.c:3065
  [Error: /build/buildd/glib2.0-2.38.0/./glib/gmain.c was not found in source tree]
#48 g_main_context_dispatch (context=context@entry=0x195b510) at /build/buildd/glib2.0-2.38.0/./glib/gmain.c:3641
  [Error: /build/buildd/glib2.0-2.38.0/./glib/gmain.c was not found in source tree]
#49 0x00007f5138ddb6f8 in g_main_context_iterate (context=context@entry=0x195b510, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.0/./glib/gmain.c:3712
  [Error: /build/buildd/glib2.0-2.38.0/./glib/gmain.c was not found in source tree]
#50 0x00007f5138ddb79c in g_main_context_iteration (context=0x195b510, context@entry=0x0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.38.0/./glib/gmain.c:3773
  [Error: /build/buildd/glib2.0-2.38.0/./glib/gmain.c was not found in source tree]
#51 0x00007f51397eaa2c in g_application_run (application=0x3129b50, argc=argc@entry=2, argv=argv@entry=0x7fff487c7a58) at /build/buildd/glib2.0-2.38.0/./gio/gapplication.c:1635
  [Error: /build/buildd/glib2.0-2.38.0/./gio/gapplication.c was not found in source tree]
#52 0x0000000000407172 in main (argc=2, argv=0x7fff487c7a58) at control-center.c:336
  331:   g_signal_connect (application, "startup",
  332:                     G_CALLBACK (application_startup_cb), shell);
  333:   g_signal_connect (application, "command-line",
  334:                     G_CALLBACK (application_command_line_cb), shell);
  335: 
  336:   status = g_application_run (G_APPLICATION (application), argc, argv);
  337: 
  338:   g_object_unref (application);
  339: 
  340:   return status;
  341: }