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Subject: Re: lexical-let void function
Date: Sun, 27 Mar 2022 00:42:03 +0100
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GNU Hacker <project@gnuhacker.org> writes:

> I find `lexical-let' func in a old emacs script, but it is a void
> function in my emacs version 28.0.92
>
> maybe require it any emacs package?

(require 'cl)

Emacs now provides "native" lexical binding. See the "Lexical binding"
node in the Elisp manual.