Re: goto-char doesn't stick

[Eli Zaretskii]

On June 14, 2017 12:45:15 PM GMT+03:00, "Elias Mårtenson" <address@hidden> 
wrote:
>I have been trying to figure out why M-. in SLIME sometimes doesn't
>move
>point to the correct location in the file, and I discovered the
>following
>strange behaviour:
>
>Assuming the cursor is at some random position in buffer "z", The SLIME
>code essentially does the following to move the cursor to a given
>location:
>
>    (progn
>      (set-buffer "z")
>      (goto-char LOCATION))
>
>When I do this, point doesn't move. Or rather, it does move, but after
>the
>conclusion of the ‘progn’ form, the cursor returns to its original
>location. This is what causes the SLIME navigation functions to not
>work
>correctly.
>
>Has this behaviour changed recently? I haven't seen anyone else
>complain
>about this, but then again, I usually run Emacs compiled from git
>master,
>so it may be that this has changed in newer versions.
>
>Regards,
>Elas

It's a feature, new in Emacs 26.  If you don't like it, turn off
switch-to-buffer-preserve-window-point.
Perhaps we should have a let-bindable variable to momentsrily disable this.