From: Paul Eggert <eggert@cs.ucla.edu>
To: liqingqing <liqingqing3@huawei.com>, "Tim Rühsen" <tim.ruehsen@gmx.de>
Cc: libc-alpha@sourceware.org, Florian Weimer <fweimer@redhat.com>,
Carlos O'Donell <carlos@redhat.com>,
Hushiyuan <hushiyuan@huawei.com>, Liusirui <liusirui@huawei.com>
Subject: Re: question about regex
Date: Mon, 20 Jan 2020 11:25:01 -0800 [thread overview]
Message-ID: <034194cc-908b-d29f-5ee7-9cf273868ff0@cs.ucla.edu> (raw)
In-Reply-To: <dbd2cdae-5a33-593e-83d8-6a3fd0f85afb@huawei.com>
On 1/20/20 2:41 AM, liqingqing wrote:
> it's not a easy work to fix bug#24269 by modify the regex algorithm.
> a possible way is that add a backtrack limit to avoid infinite loop.
If there's an arbitrary backtrack limit, won't that cause the code to mishandle
some regular expressions? That is, wouldn't an arbitrary limit cause the code to
incorrectly fail to match in some cases? In some sense that would be worse than
looping.
Perhaps I am misunderstanding what you're proposing. If so, could you give more
details about the proposal?
next prev parent reply other threads:[~2020-01-20 19:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-14 8:44 [discuss] iconv: what's the purpose of the mtrace in the tst-iconv2.c liqingqing
2020-01-02 10:54 ` question about regex liqingqing
2020-01-02 16:16 ` Tim Rühsen
2020-01-02 22:14 ` Paul Eggert
2020-01-03 8:09 ` liqingqing
2020-01-20 10:41 ` liqingqing
2020-01-20 19:25 ` Paul Eggert [this message]
2020-01-21 1:15 ` liqingqing
2020-01-21 8:57 ` Paul Eggert
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