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bug#18577: Regexp I-search: [(error Stack overflow in regexp matcher)]


From: Andreas Schwab
Subject: bug#18577: Regexp I-search: [(error Stack overflow in regexp matcher)]
Date: Sun, 28 Sep 2014 14:48:22 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.93 (gnu/linux)

Alan Mackenzie <address@hidden> writes:

> Is this a defect in my regexp or in the regexp engine?

It is fundamental to the way regexp matching works.

> If the former, how could I rewrite the regexp so that it would not hit
> these problems?

Avoid matching the null string in infinite ways.  If you need to match
the null string, make sure it is anchored with non-null matches.

Andreas.

-- 
Andreas Schwab, address@hidden
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