[ruby-core:112975] [Ruby master Bug#19476] Regexp unexpected partial match

22 Mar 2023

      Issue #19476 has been updated by naruse (Yui NARUSE).

Backport changed from 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED to 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONTNEED, 3.2: DONE

ruby_3_2 ad6fe84dfa6935bd6e2c3ef3ee36bed4e8627d0b merged revision(s) dddc542e9b61b292d80a96d0d0efbbf58719e3be.

----------------------------------------
Bug #19476: Regexp unexpected partial match
https://bugs.ruby-lang.org/issues/19476#change-102503

* Author: andreccosta (André Costa)
* Status: Closed
* Priority: Normal
* Assignee: make_now_just (Hiroya Fujinami)
* ruby -v: ruby 3.2.1 (2023-02-08 revision 31819e82c8) [arm64-darwin22]
* Backport: 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONTNEED, 3.2: DONE
----------------------------------------
This regular expression does not have the expected match since Ruby 3.2.

Ruby 3.2.1:

```ruby
...
RUBY_VERSION
=> "3.2.1"
"123456789".match(/(\(?\d-?\)?){6,15}/)
=> #<MatchData "123456" 1:"6">
"123456789".match(/(\d-?\)?){6,}/)
=> #<MatchData "123456" 1:"6">

Results in a partial match even though the specified quantifiers should allow matching the whole string.

Ruby 3.1.3:

``` ruby
> RUBY_VERSION
=> "3.1.3"
> "123456789".match(/(\(?\d-?\)?){6,15}/)
=> #&lt;MatchData "123456789" 1:"9">
> "123456789".match(/(\d-?\)?){6,}/)
=> #&lt;MatchData "123456789" 1:"9">

Which is the outcome for both patterns in previous versions.

-- 
https://bugs.ruby-lang.org/