bug#62857: CUA rectangle mode in occur edit mode

[Eli Zaretskii]

> From: Daniel Fleischer <danflscr@gmail.com>
> Date: Sat, 15 Apr 2023 13:13:37 +0300
> 
> Hi, it seems cua-rectangle-mark-mode doesn't work as expected in
> occur-edit-mode. When inserting a char you get "Args out of range" but
> then it inserts. When finish editing with "C-c C-c", nothing is applied
> back to the original buffer.
> 
> Emacs GNU Emacs 30.0.50 (build 2, x86_64-apple-darwin20.6.0, NS
> appkit-2022.70 Version 11.7.5 (Build 20G1225)).

Could you please post a recipe for reproducing this problem, starting
from "emacs -Q"?

Thanks.