From: "tompng (tomoya ishida) via ruby-core" <ruby-core@ml.ruby-lang.org>
To: ruby-core@ml.ruby-lang.org
Cc: "tompng (tomoya ishida)" <noreply@ruby-lang.org>
Subject: [ruby-core:115933] [Ruby master Bug#20098] Wrong regexp match in ruby 3.2 and 3.3
Date: Wed, 27 Dec 2023 12:15:54 +0000 (UTC) [thread overview]
Message-ID: <redmine.issue-20098.20231227121554.10330@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-20098.20231227121554.10330@ruby-lang.org
Issue #20098 has been reported by tompng (tomoya ishida).
----------------------------------------
Bug #20098: Wrong regexp match in ruby 3.2 and 3.3
https://bugs.ruby-lang.org/issues/20098
* Author: tompng (tomoya ishida)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +MN [arm64-darwin22]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
These regexp all matches in ruby 3.1.4, but not in ruby 3.3.0.
~~~ruby
p /a((.|.)|bc){,4}z/.match? 'abcbcbcbcz'
p /a(b+?c*){4,5}z/.match? 'abbbccbbbccbcbcz' # matches in ruby 3.2.2
p /a(b+?(.|.)){2,3}z/.match? 'abbbcbbbcbbbcz'
p /a(b*?(.|.)[bc]){2,5}z/.match? 'abcbbbcbcccbcz'
~~~
Adding backref (to disable optimization) makes them match.
~~~ruby
p /()\1a((.|.)|bc){,4}z/.match? 'abcbcbcbcz'
p /()\1a(b+?c*){4,5}z/.match? 'abbbccbbbccbcbcz'
p /()\1a(b+?(.|.)){2,3}z/.match? 'abbbcbbbcbbbcz'
p /()\1a(b*?(.|.)[bc]){2,5}z/.match? 'abcbbbcbcccbcz'
~~~
Found in this script https://gist.github.com/tompng/aa0706a181e9187bd79e8cec5a5f3c97
--
https://bugs.ruby-lang.org/
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next parent reply other threads:[~2023-12-27 12:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-27 12:15 tompng (tomoya ishida) via ruby-core [this message]
2023-12-28 14:56 ` [ruby-core:115963] [Ruby master Bug#20098] Wrong regexp match in ruby 3.2 and 3.3 dentarg (Patrik Ragnarsson) via ruby-core
2023-12-28 19:44 ` [ruby-core:115968] " tompng (tomoya ishida) via ruby-core
2024-02-13 6:19 ` [ruby-core:116686] " weilandia (Nick Weiland) via ruby-core
2024-03-20 23:53 ` [ruby-core:117273] " naruse (Yui NARUSE) via ruby-core
2024-03-31 8:31 ` [ruby-core:117382] " nagachika (Tomoyuki Chikanaga) via ruby-core
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