Bug #20098
closedWrong regexp match in ruby 3.2 and 3.3
Description
These regexp all matches in ruby 3.1.4, but not in ruby 3.3.0.
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.
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
Updated by dentarg (Patrik Ragnarsson) 8 months ago
Updated by tompng (tomoya ishida) 8 months ago
Not same. https://bugs.ruby-lang.org/issues/20083 is fixed in master branch. This issue is found in a branch that fixes 20083.
Updated by weilandia (Nick Weiland) 6 months ago
Looks to be the same bug, but I cannot make it match with the backref. Below example matches in 3.2.2 but not in 3.3.0
str = "------------abcdefg------------#3895912"
re = /()\1\b\w*[a-zA-Z-]*\d+[\w-]{3,}\w+\b/
re.match?(str)
Updated by naruse (Yui NARUSE) 5 months ago
- Status changed from Open to Closed
- Backport changed from 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN to 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: REQUIRED
Updated by naruse (Yui NARUSE) 5 months ago
- Backport changed from 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: REQUIRED to 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED, 3.3: REQUIRED
Updated by naruse (Yui NARUSE) 5 months ago
- Backport changed from 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED, 3.3: REQUIRED to 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED, 3.3: DONE
ruby_3_3 7ae8abc23961bf4fa143a7a2cc0bc38167d468ae merged revision(s) bb59696614083660241ef272f222628cbfa95844.
Updated by nagachika (Tomoyuki Chikanaga) 5 months ago
The changeset bb59696614083660241ef272f222628cbfa95844 cannot be merged into ruby_3_2 branch cleanly and hard to me to write a patch. @tompng (tomoya ishida) Could you kindly create the patch for ruby_3_2 branch?