#0  strrchr () at ../sysdeps/x86_64/strrchr.S:32
  [Error: ../sysdeps/x86_64/strrchr.S was not found in source tree]
#1  0x00007face1c6af97 in _gtk_menu_tracker_item_new (observable=0x1d85d80, model=model@entry=0x1db1b80, item_index=item_index@entry=5, action_namespace=0x1e03bb0 "indicator.thunderbird", is_separator=is_separator@entry=0) at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmenutrackeritem.c:524
  [Error: /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmenutrackeritem.c was not found in source tree]
#2  0x00007face1c69e8d in gtk_menu_tracker_add_items (tracker=tracker@entry=0x1d89390, change_point=change_point@entry=0x2431d88, offset=offset@entry=8, model=model@entry=0x1db1b80, position=position@entry=5, n_items=0, n_items@entry=1, section=0x1d91060) at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmenutracker.c:342
  [Error: /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmenutracker.c was not found in source tree]
#3  0x00007face1c6a175 in gtk_menu_tracker_model_changed (model=0x1db1b80, position=5, removed=0, added=1, user_data=0x1d89390) at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmenutracker.c:445
  [Error: /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmenutracker.c was not found in source tree]
#4  0x00007facdc46cafe in ffi_call_unix64 () at ../src/x86/unix64.S:76
  [Error: ../src/x86/unix64.S was not found in source tree]
#5  0x00007facdc46c568 in ffi_call (cif=cif@entry=0x7fffbf0f9980, fn=0x7face1c6a070 <gtk_menu_tracker_model_changed>, rvalue=0x7fffbf0f98f0, avalue=avalue@entry=0x7fffbf0f9870) at ../src/x86/ffi64.c:525
  [Error: ../src/x86/ffi64.c was not found in source tree]
#6  0x00007face0dfcbf8 in g_cclosure_marshal_generic (closure=0x1e03aa0, return_gvalue=0x0, n_param_values=<optimized out>, param_values=<optimized out>, invocation_hint=<optimized out>, marshal_data=0x0) at /build/buildd/glib2.0-2.41.0/./gobject/gclosure.c:1448
  [Error: /build/buildd/glib2.0-2.41.0/./gobject/gclosure.c was not found in source tree]
#7  0x00007face0dfc3b8 in g_closure_invoke (closure=0x1e03aa0, return_value=0x0, n_param_values=4, param_values=0x7fffbf0f9b80, invocation_hint=0x7fffbf0f9b20) at /build/buildd/glib2.0-2.41.0/./gobject/gclosure.c:768
  [Error: /build/buildd/glib2.0-2.41.0/./gobject/gclosure.c was not found in source tree]
#8  0x00007face0e0de2d in signal_emit_unlocked_R (node=node@entry=0x1d87e90, detail=detail@entry=0, instance=instance@entry=0x1db1b80, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffbf0f9b80) at /build/buildd/glib2.0-2.41.0/./gobject/gsignal.c:3551
  [Error: /build/buildd/glib2.0-2.41.0/./gobject/gsignal.c was not found in source tree]
#9  0x00007face0e15b19 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffbf0f9d48) at /build/buildd/glib2.0-2.41.0/./gobject/gsignal.c:3307
  [Error: /build/buildd/glib2.0-2.41.0/./gobject/gsignal.c was not found in source tree]
#10 0x00007face0e15dd2 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.41.0/./gobject/gsignal.c:3363
  [Error: /build/buildd/glib2.0-2.41.0/./gobject/gsignal.c was not found in source tree]
#11 0x00007face10e7e47 in g_menu_model_items_changed (model=<optimized out>, position=position@entry=5, removed=removed@entry=0, added=added@entry=1) at /build/buildd/glib2.0-2.41.0/./gio/gmenumodel.c:688
  [Error: /build/buildd/glib2.0-2.41.0/./gio/gmenumodel.c was not found in source tree]
#12 0x00007face10ead92 in g_dbus_menu_model_changed (added=1, removed=0, position=5, items=0x237cb10, proxy=<optimized out>) at /build/buildd/glib2.0-2.41.0/./gio/gdbusmenumodel.c:825
  [Error: /build/buildd/glib2.0-2.41.0/./gio/gdbusmenumodel.c was not found in source tree]
#13 g_dbus_menu_group_changed (group=0x1d84e70, menu_id=5, position=5, removed=0, added=<optimized out>) at /build/buildd/glib2.0-2.41.0/./gio/gdbusmenumodel.c:628
  [Error: /build/buildd/glib2.0-2.41.0/./gio/gdbusmenumodel.c was not found in source tree]
#14 0x00007face10eb3e9 in g_dbus_menu_path_signal (connection=<optimized out>, sender_name=<optimized out>, object_path=<optimized out>, interface_name=<optimized out>, signal_name=<optimized out>, parameters=<optimized out>, user_data=0x1b69b60) at /build/buildd/glib2.0-2.41.0/./gio/gdbusmenumodel.c:291
  [Error: /build/buildd/glib2.0-2.41.0/./gio/gdbusmenumodel.c was not found in source tree]
#15 0x00007face1101015 in emit_signal_instance_in_idle_cb (data=0x7faccc42f7a0) at /build/buildd/glib2.0-2.41.0/./gio/gdbusconnection.c:3753
  [Error: /build/buildd/glib2.0-2.41.0/./gio/gdbusconnection.c was not found in source tree]
#16 0x00007face0b2cd25 in g_main_dispatch (context=0x1adfc50) at /build/buildd/glib2.0-2.41.0/./glib/gmain.c:3064
  [Error: /build/buildd/glib2.0-2.41.0/./glib/gmain.c was not found in source tree]
#17 g_main_context_dispatch (context=context@entry=0x1adfc50) at /build/buildd/glib2.0-2.41.0/./glib/gmain.c:3663
  [Error: /build/buildd/glib2.0-2.41.0/./glib/gmain.c was not found in source tree]
#18 0x00007face0b2d088 in g_main_context_iterate (context=0x1adfc50, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.41.0/./glib/gmain.c:3734
  [Error: /build/buildd/glib2.0-2.41.0/./glib/gmain.c was not found in source tree]
#19 0x00007face0b2d34a in g_main_loop_run (loop=0x1b0ee80) at /build/buildd/glib2.0-2.41.0/./glib/gmain.c:3928
  [Error: /build/buildd/glib2.0-2.41.0/./glib/gmain.c was not found in source tree]
#20 0x00007face1c4ad15 in gtk_main () at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmain.c:1192
  [Error: /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmain.c was not found in source tree]
#21 0x000000000040589b in main ()