#0  gtk_css_node_invalidate (cssnode=cssnode@entry=0x0, change=change@entry=4294967296) at ../../../../gtk/gtkcssnode.c:1360
  [Error: gtkcssnode.c was not found in source tree]
#1  0x00007f7b3f4d0623 in gtk_css_node_invalidate_style_provider (cssnode=0x0) at ../../../../gtk/gtkcssnode.c:1314
  [Error: gtkcssnode.c was not found in source tree]
#2  0x00007f7b3dc5ff9d in g_closure_invoke (closure=0x56138d3b87b0, return_value=0x0, n_param_values=1, param_values=0x7fff66392f40, invocation_hint=0x7fff66392ec0) at ../../../../gobject/gclosure.c:804
  [Error: gclosure.c was not found in source tree]
#3  0x00007f7b3dc72cde in signal_emit_unlocked_R (node=node@entry=0x56138d0f4c10, detail=detail@entry=0, instance=instance@entry=0x56138d0e4c00, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff66392f40) at ../../../../gobject/gsignal.c:3635
  [Error: gsignal.c was not found in source tree]
#4  0x00007f7b3dc7b4b5 in g_signal_emit_valist (instance=0x56138d0e4c00, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fff66393100) at ../../../../gobject/gsignal.c:3391
  [Error: gsignal.c was not found in source tree]
#5  0x00007f7b3dc7becf in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at ../../../../gobject/gsignal.c:3447
  [Error: gsignal.c was not found in source tree]
#6  0x00007f7b3dc5ff9d in g_closure_invoke (closure=0x56138d100680, return_value=0x0, n_param_values=1, param_values=0x7fff663933a0, invocation_hint=0x7fff66393320) at ../../../../gobject/gclosure.c:804
  [Error: gclosure.c was not found in source tree]
#7  0x00007f7b3dc72cde in signal_emit_unlocked_R (node=node@entry=0x56138d0f4c10, detail=detail@entry=0, instance=instance@entry=0x56138d0a4440, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff663933a0) at ../../../../gobject/gsignal.c:3635
  [Error: gsignal.c was not found in source tree]
#8  0x00007f7b3dc7b4b5 in g_signal_emit_valist (instance=0x56138d0a4440, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fff66393560) at ../../../../gobject/gsignal.c:3391
  [Error: gsignal.c was not found in source tree]
#9  0x00007f7b3dc7becf in g_signal_emit (instance=instance@entry=0x56138d0a4440, signal_id=<optimized out>, detail=detail@entry=0) at ../../../../gobject/gsignal.c:3447
  [Error: gsignal.c was not found in source tree]
#10 0x00007f7b3f63595f in _gtk_style_provider_private_changed (provider=provider@entry=0x56138d0a4440) at ../../../../gtk/gtkstyleproviderprivate.c:113
  [Error: gtkstyleproviderprivate.c was not found in source tree]
#11 0x00007f7b3f616730 in settings_invalidate_style (settings=0x56138d0a4440) at ../../../../gtk/gtksettings.c:1999
  [Error: gtksettings.c was not found in source tree]
#12 gtk_settings_notify (object=0x56138d0a4440, pspec=<optimized out>) at ../../../../gtk/gtksettings.c:2062
  [Error: gtksettings.c was not found in source tree]
#13 0x00007f7b3dc5ff9d in g_closure_invoke (closure=0x56138d0755f0, return_value=0x0, n_param_values=2, param_values=0x7fff66393830, invocation_hint=0x7fff663937b0) at ../../../../gobject/gclosure.c:804
  [Error: gclosure.c was not found in source tree]
#14 0x00007f7b3dc72dae in signal_emit_unlocked_R (node=node@entry=0x56138d06db60, detail=detail@entry=656, instance=instance@entry=0x56138d0a4440, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff66393830) at ../../../../gobject/gsignal.c:3565
  [Error: gsignal.c was not found in source tree]
#15 0x00007f7b3dc7b4b5 in g_signal_emit_valist (instance=0x56138d0a4440, signal_id=<optimized out>, detail=656, var_args=var_args@entry=0x7fff66393a00) at ../../../../gobject/gsignal.c:3391
  [Error: gsignal.c was not found in source tree]
#16 0x00007f7b3dc7becf in g_signal_emit (instance=instance@entry=0x56138d0a4440, signal_id=<optimized out>, detail=<optimized out>) at ../../../../gobject/gsignal.c:3447
  [Error: gsignal.c was not found in source tree]
#17 0x00007f7b3dc64464 in g_object_dispatch_properties_changed (object=0x56138d0a4440, n_pspecs=<optimized out>, pspecs=<optimized out>) at ../../../../gobject/gobject.c:1080
  [Error: gobject.c was not found in source tree]
#18 0x00007f7b3dc669a9 in g_object_notify_by_spec_internal (pspec=0x56138d0e74f0, object=0x56138d0a4440) at ../../../../gobject/gobject.c:1173
  [Error: gobject.c was not found in source tree]
#19 g_object_notify_by_pspec (object=object@entry=0x56138d0a4440, pspec=0x56138d0e74f0) at ../../../../gobject/gobject.c:1283
  [Error: gobject.c was not found in source tree]
#20 0x00007f7b3f619c79 in settings_update_font_name (settings=settings@entry=0x56138d0a4440) at ../../../../gtk/gtksettings.c:3623
  [Error: gtksettings.c was not found in source tree]
#21 0x00007f7b3f61a671 in settings_update_font_name (settings=settings@entry=0x56138d0a4440) at ../../../../gtk/gtksettings.c:3637
  [Error: gtksettings.c was not found in source tree]
#22 gtk_settings_get_font_size (settings=settings@entry=0x56138d0a4440) at ../../../../gtk/gtksettings.c:3638
  [Error: gtksettings.c was not found in source tree]
#23 0x00007f7b3f4c02ec in gtk_css_font_size_get_default_px (provider=<optimized out>, style=0x56138d3c80b0) at ../../../../gtk/gtkcssenumvalue.c:214
  [Error: gtkcssenumvalue.c was not found in source tree]
#24 0x00007f7b3f4c0503 in gtk_css_value_font_size_compute (value=<optimized out>, property_id=<optimized out>, provider=<optimized out>, style=<optimized out>, parent_style=<optimized out>) at ../../../../gtk/gtkcssenumvalue.c:247
  [Error: gtkcssenumvalue.c was not found in source tree]
#25 0x00007f7b3f4e3303 in gtk_css_static_style_compute_value (style=0x56138d3c80b0, provider=0x56138d0a4440, parent_style=0x0, id=2, specified=0x7f7b3fc58060 <inherit>, section=0x0) at ../../../../gtk/gtkcssstaticstyle.c:237
  [Error: gtkcssstaticstyle.c was not found in source tree]
#26 0x00007f7b3f4ceb3c in _gtk_css_lookup_resolve (lookup=lookup@entry=0x56138d1f3200, provider=provider@entry=0x56138d0a4440, style=style@entry=0x56138d3c80b0, parent_style=parent_style@entry=0x0) at ../../../../gtk/gtkcsslookup.c:122
  [Error: gtkcsslookup.c was not found in source tree]
#27 0x00007f7b3f4e323c in gtk_css_static_style_new_compute (provider=provider@entry=0x56138d0a4440, matcher=matcher@entry=0x0, parent=parent@entry=0x0) at ../../../../gtk/gtkcssstaticstyle.c:195
  [Error: gtkcssstaticstyle.c was not found in source tree]
#28 0x00007f7b3f4e3295 in gtk_css_static_style_get_default () at ../../../../gtk/gtkcssstaticstyle.c:164
  [Error: gtkcssstaticstyle.c was not found in source tree]
#29 0x00007f7b3f4cf4b2 in gtk_css_node_init (cssnode=0x56138d2ef140) at ../../../../gtk/gtkcssnode.c:667
  [Error: gtkcssnode.c was not found in source tree]
#30 0x00007f7b3dc84738 in g_type_create_instance (type=<optimized out>) at ../../../../gobject/gtype.c:1860
  [Error: gtype.c was not found in source tree]
#31 0x00007f7b3dc655e8 in g_object_new_internal (class=class@entry=0x56138d2ef800, params=params@entry=0x0, n_params=n_params@entry=0) at ../../../../gobject/gobject.c:1797
  [Error: gobject.c was not found in source tree]
#32 0x00007f7b3dc66d85 in g_object_new_with_properties (object_type=94641973984080, n_properties=0, names=names@entry=0x0, values=values@entry=0x0) at ../../../../gobject/gobject.c:1965
  [Error: gobject.c was not found in source tree]
#33 0x00007f7b3dc67801 in g_object_new (object_type=<optimized out>, first_property_name=first_property_name@entry=0x0) at ../../../../gobject/gobject.c:1637
  [Error: gobject.c was not found in source tree]
#34 0x00007f7b3f4d4dfb in gtk_css_path_node_new (context=context@entry=0x56138d2d0b20) at ../../../../gtk/gtkcsspathnode.c:142
  [Error: gtkcsspathnode.c was not found in source tree]
#35 0x00007f7b3f62f8ce in gtk_style_context_init (context=0x56138d2d0b20) at ../../../../gtk/gtkstylecontext.c:355
  [Error: gtkstylecontext.c was not found in source tree]
#36 0x00007f7b3dc84775 in g_type_create_instance (type=<optimized out>) at ../../../../gobject/gtype.c:1866
  [Error: gtype.c was not found in source tree]
#37 0x00007f7b3dc655e8 in g_object_new_internal (class=class@entry=0x56138d2da5c0, params=params@entry=0x0, n_params=n_params@entry=0) at ../../../../gobject/gobject.c:1797
  [Error: gobject.c was not found in source tree]
#38 0x00007f7b3dc66d85 in g_object_new_with_properties (object_type=94641973060496, n_properties=0, names=names@entry=0x0, values=values@entry=0x0) at ../../../../gobject/gobject.c:1965
  [Error: gobject.c was not found in source tree]
#39 0x00007f7b3dc67801 in g_object_new (object_type=<optimized out>, first_property_name=first_property_name@entry=0x0) at ../../../../gobject/gobject.c:1637
  [Error: gobject.c was not found in source tree]
#40 0x00007f7b3f62fd59 in gtk_style_context_new () at ../../../../gtk/gtkstylecontext.c:562
  [Error: gtkstylecontext.c was not found in source tree]
#41 0x000056138b511e90 in indicator_keyboard_source_get_style_context (self=0x56138d2d0960) at source.c:1381
  [Error: source.c was not found in source tree]
#42 indicator_keyboard_source_real_create_icon (self=0x56138d2d0960) at source.c:1461
  [Error: source.c was not found in source tree]
#43 0x000056138b512756 in _indicator_keyboard_source_get_icon (self=0x56138d2d0960) at source.c:1940
  [Error: source.c was not found in source tree]
#44 indicator_keyboard_source_get_icon (self=0x56138d2d0960) at source.c:2030
  [Error: source.c was not found in source tree]
#45 0x000056138b50c930 in indicator_keyboard_service_update_indicator_action (self=0x56138d076110) at main.c:4289
  [Error: main.c was not found in source tree]
#46 0x000056138b50ccf2 in indicator_keyboard_service_get_indicator_action (self=0x56138d076110) at main.c:4431
  [Error: main.c was not found in source tree]
#47 0x000056138b50f1c5 in indicator_keyboard_service_get_action_group (self=0x56138d076110) at main.c:5161
  [Error: main.c was not found in source tree]
#48 0x000056138b50fefe in indicator_keyboard_service_handle_bus_acquired (name=<optimized out>, connection=0x56138d0d3140, self=0x56138d076110) at main.c:6240
  [Error: main.c was not found in source tree]
#49 _indicator_keyboard_service_handle_bus_acquired_gbus_acquired_callback (connection=0x56138d0d3140, name=<optimized out>, self=0x56138d076110) at main.c:1291
  [Error: main.c was not found in source tree]
#50 0x00007f7b36bdedae in ffi_call_unix64 () at ../src/x86/unix64.S:76
  [Error: unix64.S was not found in source tree]
#51 0x00007f7b36bde71f in ffi_call (cif=cif@entry=0x7fff663946e0, fn=fn@entry=0x56138b50feb0 <_indicator_keyboard_service_handle_bus_acquired_gbus_acquired_callback>, rvalue=<optimized out>, avalue=avalue@entry=0x7fff663945f0) at ../src/x86/ffi64.c:525
  [Error: ffi64.c was not found in source tree]
#52 0x00007f7b3dc60799 in g_cclosure_marshal_generic (closure=0x56138d1e18f0, return_gvalue=0x0, n_param_values=<optimized out>, param_values=<optimized out>, invocation_hint=<optimized out>, marshal_data=<optimized out>) at ../../../../gobject/gclosure.c:1490
  [Error: gclosure.c was not found in source tree]
#53 0x00007f7b3dc5ff9d in g_closure_invoke (closure=0x56138d1e18f0, return_value=0x0, n_param_values=2, param_values=0x7fff663947c0, invocation_hint=0x0) at ../../../../gobject/gclosure.c:804
  [Error: gclosure.c was not found in source tree]
#54 0x00007f7b3df6a8f5 in own_with_closures_on_bus_acquired (connection=<optimized out>, name=0x56138d16da40 "com.canonical.indicator.keyboard", user_data=0x56138d16b9f0) at ../../../../gio/gdbusnameowning.c:730
  [Error: gdbusnameowning.c was not found in source tree]
#55 0x00007f7b3df6b094 in connection_get_cb (source_object=<optimized out>, res=0x56138d11b820, user_data=0x56138d1edf80) at ../../../../gio/gdbusnameowning.c:487
  [Error: gdbusnameowning.c was not found in source tree]
#56 0x00007f7b3df2f203 in g_task_return_now (task=0x56138d11b820) at ../../../../gio/gtask.c:1145
  [Error: gtask.c was not found in source tree]
#57 0x00007f7b3df2fc26 in g_task_return (task=0x56138d11b820, type=<optimized out>) at ../../../../gio/gtask.c:1203
  [Error: gtask.c was not found in source tree]
#58 0x00007f7b3df5ddb2 in bus_get_async_initable_cb (source_object=0x56138d0d3140, res=<optimized out>, user_data=0x56138d11b820) at ../../../../gio/gdbusconnection.c:7302
  [Error: gdbusconnection.c was not found in source tree]
#59 0x00007f7b3df2f203 in g_task_return_now (task=0x7f7b20004440) at ../../../../gio/gtask.c:1145
  [Error: gtask.c was not found in source tree]
#60 0x00007f7b3df2f239 in complete_in_idle_cb (task=0x7f7b20004440) at ../../../../gio/gtask.c:1159
  [Error: gtask.c was not found in source tree]
#61 0x00007f7b3d986e25 in g_main_dispatch (context=0x56138d0bf200) at ../../../../glib/gmain.c:3148
  [Error: gmain.c was not found in source tree]
#62 g_main_context_dispatch (context=context@entry=0x56138d0bf200) at ../../../../glib/gmain.c:3813
  [Error: gmain.c was not found in source tree]
#63 0x00007f7b3d9871f0 in g_main_context_iterate (context=0x56138d0bf200, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3886
  [Error: gmain.c was not found in source tree]
#64 0x00007f7b3d987502 in g_main_loop_run (loop=0x56138d16ba10) at ../../../../glib/gmain.c:4082
  [Error: gmain.c was not found in source tree]
#65 0x000056138b50f04c in indicator_keyboard_service_up (self=0x56138d076110) at main.c:1270
  [Error: main.c was not found in source tree]
#66 0x000056138b5101e9 in indicator_keyboard_service_main (args=<optimized out>, args_length1=<optimized out>) at main.c:6322
  [Error: main.c was not found in source tree]
#67 0x00007f7b3cef81c1 in __libc_start_main (main=0x56138b5080e0 <main>, argc=2, argv=0x7fff66394b08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff66394af8) at ../csu/libc-start.c:308
  [Error: libc-start.c was not found in source tree]
#68 0x000056138b50811a in _start ()