ruby/NEWS.md

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]

• Keyword splatting nil when calling methods is now supported. **nil is treated similar to **{}, passing no keywords, and not calling any conversion methods. [Bug #20064]

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
• erb 4.0.4
• fiddle 1.1.3
• io-console 0.7.2
• irb 1.11.2
• net-http 0.4.1
• prism 0.22.0
• reline 0.4.2
• stringio 3.1.1
• strscan 3.1.1

The following bundled gems are updated.

• minitest 5.22.2
• net-ftp 0.3.4
• net-imap 0.4.10
• net-smtp 0.4.0.1
• rbs 3.4.4
• typeprof 0.21.10
• debug 1.9.1

The following bundled gems are promoted from default gems.

• mutex_m 0.2.0
• getoptlong 0.2.1
• base64 0.2.0
• bigdecimal 3.1.6
• observer 0.1.2
• abbrev 0.1.2
• resolv-replace 0.1.1
• rinda 0.2.0
• drb 2.2.0
• nkf 0.2.0
• syslog 0.1.2
• csv 3.2.8

See GitHub releases like GitHub Releases of Logger or changelog for details of the default gems or bundled gems.

Supported platforms

Compatibility issues

Stdlib compatibility issues

C API updates

Implementation improvements

• Array#each is rewritten in Ruby for better performance [Feature #20182].

JIT