bug#29170: 26.0.90; Emacs freezes when capturing an org-template

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Fri, 02 Oct 2020 07:16:57 +0200
> Cc: 29170@debbugs.gnu.org
> 
> daimrod@omecha.info (Grégoire Jadi) writes:
> 
> > For some time now (emacs-25.1), emacs freezes when I use `org-capture'.
> > The problem occurs when emacs tries to read the SECONDARY selection.
> >
> > The following snippet can be used to freeze emacs for 2s everytime on my
> > computer :
> > (let ((value 'SECONDARY)
> >       (x-selection-timeout 2000))
> >   ;;; from org-get-x-clipboard in lisp/org-compat.el
> >   (gui-get-selection value 'UTF8_STRING)
> >   (gui-get-selection value 'COMPOUND_TEXT)
> >   (gui-get-selection value 'STRING)
> >   (gui-get-selection value 'TEXT))
> >
> > If the user (me) send any commands (C-p, C-n, M-x, ...) to emacs when it
> > is frozen, Emacs will stay frozen even after the 2s timeout.
> 
> I tried this recipe now on OpenBSD with Emacs 28, and I can confirm that
> this freezes Emacs.

Can you debug the cause which causes the freeze?  What is the code
that freezes?