Ruby 3.4.0 rc1 Released

[NewsBot]

A new Ruby blog post/announcement has been posted!

We are pleased to announce the release of Ruby 3.4.0-rc1. In

Prism

Switch the default parser from parse.y to Prism. [Feature #20564]

Modular GC

• Alternative garbage collector (GC) implementations can be loaded dynamically through the modular garbage collector feature. To enable this feature, configure Ruby with --with-modular-gc at build time. GC libraries can be loaded at runtime using the environment variable RUBY_GC_LIBRARY. [Feature #20351]

• Ruby’s built-in garbage collector has been split into a separate file at gc/default/default.c and interacts with Ruby using an API defined in https://www.ruby-lang.org/en/news/2024/12/12/ruby-3-4-0-rc1-released/