Ruby

This is a bug in regex optimization.

Some optimizations have been disabled for memoization since 3.3.0. Therefore, another optimization was enabled, and that bug has surfaced.

By complicating the content of the first loop, we can confirm that the same problem occurs in 3.2 and earlier.

$ ruby --version ruby 3.2.1 (2023-02-08 revision 31819e82c8) [arm64-darwin22] $ ruby -e 'p "1.2.3"[/((?:\d|foo|bar)+)(\.\g<1>){2}/]' nil 

#9897 will fix this bug.