F7 to toggle caret visibility crashes GtkTextView
On GTK 4 master, if you use F7 to toggle the cursor visibility while it is blinking, you'll get an assertion.
Gtk:ERROR:../../../../Projects/gtk+/gtk/gtktextview.c:6003:blink_cb: assertion failed: (cursor_visible (text_view))
Bail out! Gtk:ERROR:../../../../Projects/gtk+/gtk/gtktextview.c:6003:blink_cb: assertion failed: (cursor_visible (text_view))