NEWS for Ruby 3.3.0

This document is a list of user-visible feature changes since the 3.2.0 release, except for bug fixes.

Note that each entry is kept to a minimum, see links for details.

Language changes

Core classes updates

Note: We're only listing outstanding class updates.

Array
- Array#pack now raises ArgumentError for unknown directives. [Bug #19150]
String
- String#unpack now raises ArgumentError for unknown directives. [Bug #19150]
- String#bytesplice now accepts new arguments index/length or range of the source string to be copied. [Feature #19314]
ObjectSpace::WeakKeyMap
- New core class to build collections with weak references. The class use equality semantic to lookup keys like a regular hash, but it doesn't hold strong references on the keys. [[Feature #18498]]

Stdlib updates

The following default gems are updated.

RubyGems 3.5.0.dev
bigdecimal 3.1.4
bundler 2.5.0.dev
csv 3.2.7
fiddle 1.1.2
irb 1.6.3
optparse 0.4.0.pre.1
psych 5.1.0
stringio 3.0.6
strscan 3.0.7
timeout 0.3.2

The following bundled gems are updated.

minitest 5.18.0
rbs 3.0.4
typeprof 0.21.7

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

Supported platforms

Compatibility issues

Stdlib compatibility issues

C API updates

Implementation improvements

JIT