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From: Richard Stallman <rms@gnu.org>
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Subject: Abort
Date: Thu, 10 Feb 2005 13:40:14 -0500
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I got a crash in this code in set_iterator_to_next.
It happened when I did a query replace, replacing \223 with ".

	  IT_BYTEPOS (*it) += it->len;
	  IT_CHARPOS (*it) += 1;
	  xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it)));

Unfortunately GDB got rather confused and I don't know which value was
wrong.