# NEWS for Ruby 3.4.0 This document is a list of user-visible feature changes since the **3.3.0** release, except for bug fixes. Note that each entry is kept to a minimum, see links for details. ## Language changes * `it` is added to reference a block parameter. [[Feature #18980]] ## Core classes updates Note: We're only listing outstanding class updates. ## Stdlib updates The following default gems are updated. * RubyGems 3.6.0.dev * bundler 2.6.0.dev * csv 3.2.9 * erb 4.0.4 * fiddle 1.1.3 * io-console 0.7.2.dev.1 * net-http 0.4.1 * reline 0.4.2 * stringio 3.1.1 * strscan 3.0.8 The following bundled gems are updated. * net-ftp 0.3.4 * net-imap 0.4.9.1 * net-smtp 0.4.0.1 * rbs 3.4.1 * typeprof 0.21.9 * debug 1.9.1 See GitHub releases like [GitHub Releases of Logger](https://github.com/ruby/logger/releases) or changelog for details of the default gems or bundled gems. ## Supported platforms ## Compatibility issues ## Stdlib compatibility issues ## C API updates ## Implementation improvements ## JIT [Feature #18980]: https://bugs.ruby-lang.org/issues/18980