(gdb) bt
#0  0x00007ffff727b729 in __GI___poll (fds=fds@entry=0x7fffffffd608, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff5905917 in poll (__timeout=-1, __nfds=1, __fds=0x7fffffffd608) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007ffff5905917 in _xcb_conn_wait (c=c@entry=0x5555555c85a0, cond=cond@entry=0x7fffffffd720, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007ffff590725f in wait_for_reply (c=c@entry=0x5555555c85a0, request=request@entry=24760, e=e@entry=0x7fffffffd7e0) at ../../src/xcb_in.c:516
#4  0x00007ffff59073d1 in xcb_wait_for_reply64 (c=0x5555555c85a0, request=24760, e=0x7fffffffd7e0) at ../../src/xcb_in.c:560
#5  0x00007ffff6bf0e38 in _XReply () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#6  0x00007ffff6bee149 in XTranslateCoordinates () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#7  0x00007ffff7780826 in gdk_window_x11_get_root_coords (window=0x5555555e64b0 [GdkX11Window], x=<optimized out>, y=<optimized out>, root_x=0x7fffffffd978, root_y=0x7fffffffd97c)
    at ../../../../../gdk/x11/gdkwindow-x11.c:3155
#8  0x00007ffff7755290 in gdk_window_get_origin (window=0x5555555e64b0 [GdkX11Window], x=x@entry=0x7fffffffd978, y=y@entry=0x7fffffffd97c) at ../../../../gdk/gdkwindow.c:6816
#9  0x00007ffff7a67456 in gtk_notebook_motion_notify (widget=0x555557ec22f0 [GtkNotebook], event=0x555557dce950) at ../../../../gtk/gtknotebook.c:3300
#10 0x00007ffff7bd1544 in _gtk_marshal_BOOLEAN__BOXEDv
    (closure=0x5555555fad50, return_value=0x7fffffffdc00, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x5555555fad80)
    at ../../../../gtk/gtkmarshalers.c:129
#11 0x00007ffff74ad0b6 in _g_closure_invoke_va (closure=0x5555555fad50, return_value=0x7fffffffdc00, instance=0x555557ec22f0, args=0x7fffffffdcd0, n_params=1, param_types=0x5555555fad80)
    at ../../../gobject/gclosure.c:873
#12 0x00007ffff74c8f24 in g_signal_emit_valist (instance=0x555557ec22f0, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffdcd0) at ../../../gobject/gsignal.c:3300
#13 0x00007ffff74c9b2f in g_signal_emit (instance=instance@entry=0x555557ec22f0, signal_id=<optimized out>, detail=detail@entry=0) at ../../../gobject/gsignal.c:3447
#14 0x00007ffff7b7e1f4 in gtk_widget_event_internal (widget=widget@entry=0x555557ec22f0 [GtkNotebook], event=event@entry=0x555557dce950) at ../../../../gtk/gtkwidget.c:7744
#15 0x00007ffff7b80f8a in gtk_widget_event (widget=widget@entry=0x555557ec22f0 [GtkNotebook], event=event@entry=0x555557dce950) at ../../../../gtk/gtkwidget.c:7314
#16 0x00007ffff7a3ecd6 in propagate_event_up (topmost=<optimized out>, event=<optimized out>, widget=0x555557ec22f0 [GtkNotebook]) at ../../../../gtk/gtkmain.c:2592
#17 0x00007ffff7a3ecd6 in propagate_event (widget=<optimized out>, event=0x555557dce950, captured=<optimized out>, topmost=0x0) at ../../../../gtk/gtkmain.c:2695
#18 0x00007ffff7a40dfb in gtk_main_do_event (event=0x555557dce950) at ../../../../gtk/gtkmain.c:1915
#19 0x00007ffff7a40dfb in gtk_main_do_event (event=<optimized out>) at ../../../../gtk/gtkmain.c:1685
#20 0x00007ffff77425e5 in _gdk_event_emit (event=event@entry=0x555557dce950) at ../../../../gdk/gdkevents.c:73
#21 0x00007ffff7773292 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at ../../../../../gdk/x11/gdkeventsource.c:367
#22 0x00007ffff73c4aae in g_main_dispatch (context=0x5555555ecc30) at ../../../glib/gmain.c:3189
#23 0x00007ffff73c4aae in g_main_context_dispatch (context=context@entry=0x5555555ecc30) at ../../../glib/gmain.c:3854
#24 0x00007ffff73c4d48 in g_main_context_iterate (context=0x5555555ecc30, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:3927
#25 0x00007ffff73c5042 in g_main_loop_run (loop=0x5555555bcf30) at ../../../glib/gmain.c:4123
#26 0x00007ffff7a3fe75 in gtk_main () at ../../../../gtk/gtkmain.c:1323
#27 0x0000555555567d80 in  ()
#28 0x00007ffff7190b6b in __libc_start_main (main=0x555555567c30, argc=1, argv=0x7fffffffe118, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe108)
    at ../csu/libc-start.c:308
#29 0x0000555555567e9a in  ()
