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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: re-search-forward hangs
Date: Mon, 30 Jul 2018 17:33:40 +0300
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> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> Date: Mon, 30 Jul 2018 14:24:06 +0200
> 
> (while (re-search-forward "" nil t 1))
> 
> Emacs hangs.
> 
> Same with plain
> 
> (while (search-forward "" nil t 1))
> 
> Expect it terminating.
> 
> Are there reasons for this?

Why did you expect it to terminate?