Thanks, I'll check it out.

On Sat, Nov 13, 2021, 10:30 AM Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Mark Kennedy <mark.t.kennedy@gmail.com>
> > Date: Sat, 13 Nov 2021 09:52:21 -0500
> > Cc: 51794@debbugs.gnu.org
> >
> > i'm willing to attempt to debug it myself but not via the -Q route.  i
> > prefer to focus on where the bad input event stream is being created.
> > any suggestions about where to put an elisp or C breakpoint to go
> > after this?
>
> In keyboard.c, under "case MOUSE_CLICK_EVENT:", step through the
> code until you get to this line:
>
>             position = make_lispy_position (f, event->x, event->y,
>                                             event->timestamp);
>
> then step into make_lispy_position, and see what it produces.
>
> (I hope I got the code right; apologies if not.)
>