#0  0x00007f5dafe5d037 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  0x00007f5dafe60698 in __GI_abort () at abort.c:90
  [Error: abort.c was not found in source tree]
#2  0x00007f5db0476576 in g_assertion_message (domain=domain@entry=0x420f3a "empathy", file=file@entry=0x421c3a "empathy-call-window.c", line=line@entry=511, func=func@entry=0x423070 <__PRETTY_FUNCTION__.96235> "add_video_preview_to_pipeline", message=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gtestutils.c:1912
  [Error: /build/buildd/glib2.0-2.35.8/./glib/gtestutils.c was not found in source tree]
#3  0x00007f5db0476ad4 in g_assertion_message_expr (domain=domain@entry=0x420f3a "empathy", file=file@entry=0x421c3a "empathy-call-window.c", line=line@entry=511, func=func@entry=0x423070 <__PRETTY_FUNCTION__.96235> "add_video_preview_to_pipeline", expr=expr@entry=0x42200c "priv->video_input != NULL") at /build/buildd/glib2.0-2.35.8/./glib/gtestutils.c:1923
  [Error: /build/buildd/glib2.0-2.35.8/./glib/gtestutils.c was not found in source tree]
#4  0x0000000000414e5f in add_video_preview_to_pipeline (self=self@entry=0x22dd980) at empathy-call-window.c:511
  506:   EmpathyCallWindowPriv *priv = GET_PRIV (self);
  507:   GstElement *preview;
  508: 
  509:   g_assert (priv->video_preview != NULL);
  510:   g_assert (priv->pipeline != NULL);
  511:   g_assert (priv->video_input != NULL);
  512:   g_assert (priv->video_tee != NULL);
  513: 
  514:   preview = priv->video_preview_sink;
  515: 
  516:   if (!gst_bin_add (GST_BIN (priv->pipeline), priv->video_input))
#5  0x0000000000417790 in display_video_preview (self=0x22dd980, display=0) at empathy-call-window.c:1237
  1232:   EmpathyCallWindowPriv *priv = GET_PRIV (self);
  1233: 
  1234:   if (priv->video_preview == NULL)
  1235:     {
  1236:       create_video_preview (self);
  1237:       add_video_preview_to_pipeline (self);
  1238:     }
  1239: 
  1240:   if (display)
  1241:     {
  1242:       /* Display the video preview */
#6  0x00000000004177eb in empathy_call_window_set_send_video (window=window@entry=0x22dd980, state=state@entry=CAMERA_STATE_OFF) at empathy-call-window.c:4007
  4002:          default. */
  4003:       display_video_preview (window, TRUE);
  4004:     }
  4005:   else
  4006:     {
  4007:       display_video_preview (window, FALSE);
  4008:     }
  4009: 
  4010:   if (priv->call_state != CONNECTED)
  4011:     return;
  4012: 
#7  0x000000000041840a in empathy_call_window_state_changed_cb (handler=<optimized out>, state=<optimized out>, reason=0x28ec4b0 "", self=0x22dd980) at empathy-call-window.c:3217
  3212: 
  3213:   if (tp_call_channel_has_dtmf (call))
  3214:     gtk_widget_set_sensitive (priv->dtmf_panel, TRUE);
  3215: 
  3216:   if (priv->video_input == NULL)
  3217:     empathy_call_window_set_send_video (self, CAMERA_STATE_OFF);
  3218: 
  3219:   gtk_widget_set_sensitive (priv->camera_button, can_send_video);
  3220: 
  3221:   empathy_call_window_show_hangup_button (self, TRUE);
  3222: 
#8  0x00007f5da59f8c18 in ffi_call_unix64 () at ../src/x86/unix64.S:76
  [Error: ../src/x86/unix64.S was not found in source tree]
#9  0x00007f5da59f8580 in ffi_call (cif=cif@entry=0x7fffb68e2d00, fn=fn@entry=0x417e70 <empathy_call_window_state_changed_cb>, rvalue=0x7fffb68e2c60, avalue=avalue@entry=0x7fffb68e2c00) at ../src/x86/ffi64.c:522
  [Error: ../src/x86/ffi64.c was not found in source tree]
#10 0x00007f5db07180ab in g_cclosure_marshal_generic (closure=0x25b5350, return_gvalue=0x0, n_param_values=<optimized out>, param_values=<optimized out>, invocation_hint=<optimized out>, marshal_data=0x417e70 <empathy_call_window_state_changed_cb>) at /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c:1454
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c was not found in source tree]
#11 0x00007f5db0717750 in g_closure_invoke (closure=0x25b5350, return_value=0x0, n_param_values=3, param_values=0x7fffb68e2f50, invocation_hint=0x7fffb68e2ef0) at /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c:777
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c was not found in source tree]
#12 0x00007f5db07299c0 in signal_emit_unlocked_R (node=node@entry=0x22c3bb0, detail=detail@entry=0, instance=instance@entry=0xf24e10, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffb68e2f50) at /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c:3566
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c was not found in source tree]
#13 0x00007f5db0731cfb in g_signal_emit_valist (instance=0xf24e10, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffb68e31c8) at /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c:3314
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c was not found in source tree]
#14 0x00007f5db0731f22 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c:3370
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c was not found in source tree]
#15 0x00000000004105c9 in on_call_state_changed_cb (call=<optimized out>, state=TP_CALL_STATE_ACCEPTED, flags=<optimized out>, reason=<optimized out>, details=<optimized out>, handler=<optimized out>) at empathy-call-handler.c:194
  189:       priv->accept_when_initialised = FALSE;
  190:       tp_clear_object (&priv->call);
  191:       tp_clear_object (&priv->tfchannel);
  192:     }
  193: 
  194:   g_signal_emit (handler, signals[STATE_CHANGED], 0, state,
  195:       reason->dbus_reason);
  196: 
  197:   if (state == TP_CALL_STATE_INITIALISED &&
  198:       priv->accept_when_initialised)
  199:     {
#16 0x00007f5da59f8c18 in ffi_call_unix64 () at ../src/x86/unix64.S:76
  [Error: ../src/x86/unix64.S was not found in source tree]
#17 0x00007f5da59f8580 in ffi_call (cif=cif@entry=0x7fffb68e3560, fn=fn@entry=0x4105a0 <on_call_state_changed_cb>, rvalue=0x7fffb68e3490, avalue=avalue@entry=0x7fffb68e3410) at ../src/x86/ffi64.c:522
  [Error: ../src/x86/ffi64.c was not found in source tree]
#18 0x00007f5db071873b in g_cclosure_marshal_generic_va (closure=0x22be110, return_value=0x0, instance=0xf0e3b0, args_list=<optimized out>, marshal_data=0x4105a0 <on_call_state_changed_cb>, n_params=4, param_types=0x229a700) at /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c:1550
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c was not found in source tree]
#19 0x00007f5db0717a17 in _g_closure_invoke_va (closure=0x22be110, return_value=0x0, instance=0xf0e3b0, args=0x7fffb68e3898, n_params=4, param_types=0x229a700) at /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c:840
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gclosure.c was not found in source tree]
#20 0x00007f5db07317f0 in g_signal_emit_valist (instance=0xf0e3b0, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffb68e3898) at /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c:3225
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c was not found in source tree]
#21 0x00007f5db0731f22 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c:3370
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gsignal.c was not found in source tree]
#22 0x00007f5db2124db5 in _tp_cli_channel_type_call_invoke_callback_for_call_state_changed (tpproxy=0xf0e3b0, error=<optimized out>, args=0x26b2240, generic_callback=0x7f5db210c890 <call_state_changed_cb>, user_data=<optimized out>, weak_object=<optimized out>) at _gen/tp-cli-channel-body.h:10181
  [Error: _gen/tp-cli-channel-body.h was not found in source tree]
#23 0x00007f5db21e275c in tp_proxy_signal_invocation_run (p=0x2697e60) at proxy-signals.c:268
  [Error: proxy-signals.c was not found in source tree]
#24 0x00007f5db0453e85 in g_main_dispatch (context=0xef0e00) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3054
  [Error: /build/buildd/glib2.0-2.35.8/./glib/gmain.c was not found in source tree]
#25 g_main_context_dispatch (context=context@entry=0xef0e00) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3630
  [Error: /build/buildd/glib2.0-2.35.8/./glib/gmain.c was not found in source tree]
#26 0x00007f5db04541c8 in g_main_context_iterate (context=context@entry=0xef0e00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3701
  [Error: /build/buildd/glib2.0-2.35.8/./glib/gmain.c was not found in source tree]
#27 0x00007f5db0454284 in g_main_context_iteration (context=0xef0e00, context@entry=0x0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3762
  [Error: /build/buildd/glib2.0-2.35.8/./glib/gmain.c was not found in source tree]
#28 0x00007f5db09fc51c in g_application_run (application=0x226b490, argc=argc@entry=1, argv=argv@entry=0x7fffb68e3c98) at /build/buildd/glib2.0-2.35.8/./gio/gapplication.c:1620
  [Error: /build/buildd/glib2.0-2.35.8/./gio/gapplication.c was not found in source tree]
#29 0x000000000040f4be in main (argc=1, argv=0x7fffb68e3c98) at empathy-call.c:251
  246:   /* the inactivity timeout can only be set while the application is held */
  247:   g_application_hold (G_APPLICATION (app));
  248:   g_application_set_inactivity_timeout (G_APPLICATION (app), TIMEOUT * 1000);
  249:   g_application_release (G_APPLICATION (app));
  250: 
  251:   retval = g_application_run (G_APPLICATION (app), argc, argv);
  252: 
  253:   g_hash_table_unref (call_windows);
  254:   g_object_unref (app);
  255:   tp_clear_object (&call_factory);
  256: