bug#61962: 30.0.50; New trouble with symbols with positions

[Alan Mackenzie]

Hello, Robert.

On Tue, Mar 07, 2023 at 14:51:38 +0100, Robert Pluim wrote:
> >>>>> On Tue, 07 Mar 2023 15:13:40 +0200, Eli Zaretskii <eliz@gnu.org> said:

>     >> Date: Tue, 7 Mar 2023 10:24:41 +0000
>     >> Cc: Mattias Engdegård <mattiase@acm.org>,
>     >> Eli Zaretskii <eliz@gnu.org>, 61962-done@debbugs.gnu.org
>     >> From: Alan Mackenzie <acm@muc.de>

>     >> I've now written safe-copy-tree, and committed it together with the fix
>     >> in bytecomp.el to master.

>     Eli> Next time when you post a patch and ask for comments, please allow
>     Eli> some time for responses, including to those who might be in different
>     Eli> time zones or have less free time on their hands.  13 hours you 
> waited
>     Eli> is definitely not enough.

> Yes. I was going to ask "why canʼt copy-tree be fixed to support
> circular lists instead of making people think about which function to
> use?".

safe-copy-tree is slower than copy-tree, probably _much_ slower, though
I haven't measured it.  If there's no possibility of circular lists,
copy-tree will be far the better function to use.

> Robert
> -- 

-- 
Alan Mackenzie (Nuremberg, Germany).