bug#67116: byte-compile-let: reversing the order of evaluation of the clauses CAN make a difference.

[Richard Stallman]

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    > first evaluates the expressions value1, value2,
    > and so on, in that order, saving the resulting values.
    > Then all of the variables varj are bound to the
    > corresponding values in parallel

That is what `let' did in MacLisp, and what it does in Emacs Lisp too.

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)