Comment 2 for bug 1870508

StacktraceTop:
 g_type_check_instance_is_a () from /tmp/apport_sandbox_5cctycbu/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.1
 atk_component_get_extents (component=component@entry=0x492f850, x=x@entry=0x7ffe331d1d28, y=y@entry=0x7ffe331d1d2c, width=width@entry=0x0, height=height@entry=0x0, coord_type=coord_type@entry=ATK_XY_SCREEN) at ../atk/atkcomponent.c:277
 gtk_notebook_page_accessible_get_extents (coord_type=ATK_XY_SCREEN, height=0x7ffe329d4134, width=<optimized out>, y=0x7ffe331d1d2c, x=0x7ffe331d1d28, component=0x492dad0) at ../../../../gtk/a11y/gtknotebookpageaccessible.c:323
 gtk_notebook_page_accessible_get_extents (component=0x492dad0, x=0x7ffe331d1d28, y=0x7ffe331d1d2c, width=<optimized out>, height=0x7ffe329d4134, coord_type=ATK_XY_SCREEN) at ../../../../gtk/a11y/gtknotebookpageaccessible.c:301
 atk_component_get_extents (component=0x492dad0, x=<optimized out>, y=<optimized out>, width=<optimized out>, height=<optimized out>, coord_type=ATK_XY_SCREEN) at ../atk/atkcomponent.c:299