[debbugs-tracker] bug#17236: closed (undo-only hangs when nils double up)

[GNU bug Tracking System]

Your message dated Sat, 12 Apr 2014 15:24:59 -0400
with message-id <address@hidden>
and subject line Re: bug#17236: undo-only hangs when nils double up
has caused the debbugs.gnu.org bug report #17236,
regarding undo-only hangs when nils double up
to be marked as done.

(If you believe you have received this mail in error, please contact
address@hidden)


-- 
17236: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17236
GNU Bug Tracking System
Contact address@hidden with problems
> --- Begin Message ---
>
>
>
> Subject: 
>
> undo-only hangs when nils double up
>
>
>
>
> Date: 
>
> Thu, 10 Apr 2014 12:15:53 -0400
>
>
>
>
> When there are consecutive nils in buffer-undo-list, undo-only can
> hang. For example, if buffer-undo-list begins with (nil nil ...), then
> the first undo-only succeeds, changes nothing, and inserts an identity
> mapping into undo-equiv-table. The second undo-only hangs because the
> identity mapping causes an infinite recursive lookup in
> undo-equiv-table.
>
> Perhaps the bug is in the Emacs package (Evil in this case) that
> doubles up the nils. I ask here because the undo code already seems to
> try to account for these to some extent. eg there are a few of these
> in the undo function:
>
>   (while (eq (car list) nil)
>          (setq list (cdr list)))
>
> Is this an Emacs bug or an Evil bug?
>
>
>
> --- End Message ---

--- Begin Message --- Subject: Re: bug#17236: undo-only hangs when nils double up Date: Sat, 12 Apr 2014 15:24:59 -0400

Rev 116951. The Evil bug was also reported and fixed.

--- End Message ---