bug#57468: 29.0.50; Text cursor continues to blink when frame loses focus

[Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> And I now have a semi-reliable way to reproduce it.
>
> emacs -Q
> C-x 5 2
>
> Then start another Emacs, and place that frame over frame 2.  Then give
> frame 2 focus.  Then switch to the other Emacs (which is covering frame
> 2).  Then click on the title bar of frame 1.  Both frame 1 and the other
> Emacs then have blinking cursors.
>
> This is with Gnome Shell.

I tried several times (also on GNOME Shell), but it didn't work.  So if
frame 2 means the frame that was created by C-x 5 2, I still can't
reproduce this, sorry.

Could you please add instrumentation to x_focus_changed, like this:

static void
x_focus_changed (int type, int state, struct x_display_info *dpyinfo, struct frame *frame,
		 struct input_event *bufp)
{
  fprintf (stderr, "x_focus_changed: %d %d %p %p\n", type, state, frame,
	   dpyinfo->x_focus_frame);

and also instrumentation to xi_handle_focus_change, like so:

	}
    }

  fprintf (stderr, "xi_handle_focus_change: %p %p\n", <== add this instrumentation
	   new, focus);                               <==

  if (new != focus && focus)
    {
#ifdef HAVE_X_I18N
      if (FRAME_XIC (focus))
	XUnsetICFocus (FRAME_XIC (focus));
#endif

and show what is printed once the cursor begins to blink in both frames?
Thanks.