Breakpoint 1, _gtk_style_context_validate (context=0x6c2510, timestamp=15558403246, change=524287, parent_changes=0x1)
    at gtkstylecontext.c:3059
3059          gtk_style_context_do_invalidate (context, full);
(gdb) bt
#0  _gtk_style_context_validate (context=0x6c2510, timestamp=15558403246, change=524287, parent_changes=0x1)
    at gtkstylecontext.c:3059
#1  0x00007ffff6dfb124 in gtk_container_idle_sizer (clock=0x7162d0, container=0x8897b0) at gtkcontainer.c:1856
#2  0x00007ffff5131233 in g_cclosure_marshal_VOID__VOIDv (closure=0xd95ad0, return_value=0x0, instance=0x7162d0, 
    args=0x7fffffffcd60, marshal_data=0x0, n_params=0, param_types=0x0) at gmarshal.c:115
#3  0x00007ffff512e2bf in _g_closure_invoke_va (closure=0xd95ad0, return_value=0x0, instance=0x7162d0, args=0x7fffffffcd60, 
    n_params=0, param_types=0x0) at gclosure.c:831
#4  0x00007ffff514a38b in g_signal_emit_valist (instance=0x7162d0, signal_id=156, detail=0, var_args=0x7fffffffcd60)
    at gsignal.c:3201
#5  0x00007ffff514b71d in g_signal_emit_by_name (instance=0x7162d0, detailed_signal=0x7ffff69ff303 "layout") at gsignal.c:3388
#6  0x00007ffff696a526 in gdk_frame_clock_paint_idle (data=0x7162d0) at gdkframeclockidle.c:408
#7  0x00007ffff69536e5 in gdk_threads_dispatch (data=0x7fffe4001560) at gdk.c:717
#8  0x00007ffff4e09f07 in g_timeout_dispatch (source=0xdfe710, callback=0x7ffff69536a0 <gdk_threads_dispatch>, 
    user_data=0x7fffe4001560) at gmain.c:4545
#9  0x00007ffff4e0805d in g_main_dispatch (context=0x6dc320) at gmain.c:3122
#10 0x00007ffff4e08f24 in g_main_context_dispatch (context=0x6dc320) at gmain.c:3737
#11 0x00007ffff4e09118 in g_main_context_iterate (context=0x6dc320, block=1, dispatch=1, self=0x6d9c10) at gmain.c:3808
#12 0x00007ffff4e091f0 in g_main_context_iteration (context=0x6dc320, may_block=1) at gmain.c:3869
#13 0x00007ffff568f77a in g_application_run (application=0x6ab120, argc=1, argv=0x7fffffffd1b8) at gapplication.c:2290
#14 0x0000000000423160 in main ()