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bug#31718: 26.1; Strange behavior of `cond'

From: Noam Postavsky
Subject: bug#31718: 26.1; Strange behavior of `cond'
Date: Sat, 16 Jun 2018 11:23:33 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

Paul Eggert <address@hidden> writes:

> A small problem: gensym does not guarantee that the resulting symbol
> is unique so the generated symbol could in theory appear in the input


    gensym is a compiled Lisp function in ‘subr.el’.

    (gensym &optional PREFIX)

    Return a new uninterned symbol.

How could a new symbol have already appeared in the input?

(I have no objection to the alternative you used, just wondering why
gensym is not also correct)

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