Re: let*: Wrong type argument: stringp, nil

[Hongyi Zhao]

On Fri, Sep 24, 2021 at 10:58 PM Emanuel Berg via Users list for the
GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:
>
> Hongyi Zhao wrote:
>
> > let*: Wrong type argument: stringp, nil
> >
> > Any hints for fixing this problem?
>
> Indeed, inside a `let*', a variable is used in a function that
> expects a string. However either the variable is set to nil,
> or it isn't set at all. nil isn't a string so the function
> cannot operate, thus the error.

How to fix it or use a more robust method?

Best, HZ