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From: Juri Linkov <juri@jurta.org>
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Subject: Re: [EXPERIMENTAL PATCH] Extending Isearch-repeat-forward/backward to
	support a prefix argument following suggesion by Juri Linkov
Date: Tue, 31 Jan 2012 22:18:21 +0200
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To: Gideon Stupp <gideon.stupp@gmail.com>
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> Please see attached patch. Note that I decided to stop the repeated
> search at wraparound and any other case where the search fails (eq
> isearch-sucess nil).

I think you are right that repeated Isearch should stop at wraparound
and other search errors.  Thanks.