Ruby 2.5.7 is now available: https://www.ruby-lang.org/en/news/2019/10/01/ruby-2-6-5-released/
(In reply to Vít Ondruch from comment #0) > https://www.ruby-lang.org/en/news/2019/10/01/ruby-2-6-5-released/ This is the correct link: https://www.ruby-lang.org/en/news/2019/10/01/ruby-2-5-7-released/
Ruby 2.5.8 is now available: https://www.ruby-lang.org/en/news/2020/03/31/ruby-2-5-8-released/
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release. Therefore, it is being closed. If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.
Ruby 2.5.9 is now available: https://www.ruby-lang.org/en/news/2021/04/05/ruby-2-5-9-released/
Moving to ON_QA for verification, because the z-stream errata was already released.