Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.090
X-Spam-Evidence: '*H*': 0.82; '*S*': 0.00; 'python': 0.11; 'subject:python': 0.12; '2.7.2': 0.16; 'limit.': 0.16; 'received:80.91': 0.16; 'received:80.91.229': 0.16; 'received:gmane.org': 0.16; 'received:list': 0.16; 'stack': 0.18; 'header:In-Reply-To:1': 0.22; 'header:User-Agent:1': 0.23; 'least': 0.27; 'code': 0.29; 'usually': 0.32; 'hi,': 0.33; 'url:python': 0.34; 'two': 0.35; 'why': 0.36; 'header:X -Complaints-To:1': 0.36; 'url:library': 0.36; 'url:org': 0.36; 'too.': 0.37; 'michael': 0.38; 'received:org': 0.38; 'to:addr :python-list': 0.39; 'to:addr:python.org': 0.40; 'levels': 0.79; 'size.': 0.79; '4000': 0.84; 'recursion': 0.84; 'recursion.': 0.84; 'warning,': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Christian Heimes <lists@cheimes.de>
Subject: Re: python segfault
Date: Wed, 28 Mar 2012 00:45:54 +0200
References: <20120327222757.GA22125@terra.cms.at>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: f048145149.adsl.alicedsl.de
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120310 Thunderbird/11.0
In-Reply-To: <20120327222757.GA22125@terra.cms.at>
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.1055.1332888367.3037.python-list@python.org>
Lines: 16
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1332888367 news.xs4all.nl 6900 [2001:888:2000:d::a6]:45897
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:22258

Am 28.03.2012 00:27, schrieb Michael Poeltl:
> hi,
> 
> can anybody tell why this 'little stupid *thing* of code' let's python-3.2.2, 2.6.X or python 2.7.2 segfault?

The code segfaults because you have increased the recursion limit. The
amount of recursions is limited by the stack size. A C program with a
usually stack size can have about 4000 recursions. Python takes at least
two stack levels for each recursion.

The documentation
http://docs.python.org/library/sys.html#sys.setrecursionlimit contains a
warning, too.

Christian