Issue #20246 has been reported by bestwebua (Vladislav Trotsenko). ---------------------------------------- Bug #20246: Unexpected behavior for Regexp in Subexpression Calls on Ruby 3.3.0 https://bugs.ruby-lang.org/issues/20246 * Author: bestwebua (Vladislav Trotsenko) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin22] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Hello! A few days ago, after migration on 3.3.0 I have faced with issue inside subexpression calls. An expected result on Ruby up to 3.3.0: ```ruby '1.2.3'[/(\d+)(\.\g<1>){2}/] # => "1.2.3" ``` An actual result on Ruby 3.3.0: ```ruby '1.2.3'[/(\d+)(\.\g<1>){2}/] # => nil ``` -- https://bugs.ruby-lang.org/