On Sun, Sep 3, 2023 at 5:06 AM jsks <js.shirin@gmail.com> wrote:
>
> Unsetting a variable declared with param/private and then modifying it returns the error "can't change parameter attribute".

This is a bug, an unintended interaction with with changes introduced
for the TYPESET_TO_UNSET option (but not affected by whether that
option is in effect).