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Ruby 3.4.0-preview1 Released (#3240)
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‎_data/branches.yml

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# date: date of first stable release (YYYY-MM-DD)
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# eol_date: date of EOL (YYYY-MM-DD)
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- name: 3.4
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status: preview
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date:
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eol_date:
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- name: 3.3
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status: normal maintenance
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date: 2023-12-25

‎_data/downloads.yml

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# optional
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preview:
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- 3.4.0-preview1
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stable:
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‎_data/releases.yml

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# In order to get the release listed on the downloads page,
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# you also need to add an entry to `_data/downloads.yml'.
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# 3.4 series
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- version: 3.4.0-preview1
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date: 2024-05-16
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post: /en/news/2024/05/16/ruby-3-4-0-preview1-released/
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tag: v3_4_0_preview1
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stats:
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files_changed: 3283
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insertions: 107449
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deletions: 115380
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url:
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gz: https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview1.tar.gz
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zip: https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview1.zip
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xz: https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.0-preview1.tar.xz
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size:
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gz: 22507726
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zip: 27731060
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xz: 16709536
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sha1:
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gz: 1619cbe06b5a8c774711b3351d18bb0f84f1d017
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zip: 5d79834050369ea9241d86467bf93e9e89e2ab7a
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xz: 6041ad2651527d01c36106de3d3cdab680ed3132
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sha256:
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gz: 1a3c322e90cb22e5fba0b5d257bb2be9988affa3867eba7642ed981fdde895bb
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zip: bd2a6c0e8396698e6f6768c00b0f155510859bb6fb92420f7b7abec610e71dbb
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xz: 4ee4ec44366050d4b2ee1d88034cc63e0b9174a1a6650285777f3d3447213a97
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sha512:
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gz: 29c0e32179f7b823b6708f5328e495cd333fe8dd88f7df7d9051deab47add67b14d899bba565bba1a77e1b04c9693d9708541445c112925777bb6891cb7b2b62
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zip: 36ea6897e6ad769141516f4c1bb18989fbde27a76f0f3abcce947f8b6b79639846ba93907e085181f7d305ab06ad73f1bbb37928049c8c951d33176ee444abbf
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xz: 4ce306b9beb1e2d88c76d7f809724b66bed17e354c07a2b54aa050fc2035652e4d83deadc8dbf7a375bbdb1c816f2996334bb8e7ff5e6c24b71a858bf6b0cb7c
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# 3.3 series
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- version: 3.3.1

‎en/news/_posts/2024-05-16-ruby-3-4-0-preview1-released.md

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---
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layout: news_post
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title: "Ruby 3.4.0 preview1 Released"
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author: "naruse"
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translator:
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date: 2024-05-16 00:00:00 +0000
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lang: en
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---
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{% assign release = site.data.releases | where: "version", "3.4.0-preview1" | first %}
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We are pleased to announce the release of Ruby {{ release.version }}.
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## Language changes
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* String literals in files without a `frozen_string_literal` comment now behave
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as if they were frozen. If they are mutated a deprecation warning is emitted.
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These warnings can be enabled with `-W:deprecated` or by setting `Warning[:deprecated] = true`.
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To disable this change, you can run Ruby with the `--disable-frozen-string-literal`
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command line argument. [[Feature #20205]]
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* `it` is added to reference a block parameter. [[Feature #18980]]
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* Keyword splatting `nil` when calling methods is now supported.
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`**nil` is treated similarly to `**{}`, passing no keywords,
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and not calling any conversion methods. [[Bug #20064]]
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* Block passing is no longer allowed in index. [[Bug #19918]]
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* Keyword arguments are no longer allowed in index. [[Bug #20218]]
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## Core classes updates
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Note: We're only listing outstanding class updates.
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* Exception
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* Exception#set_backtrace now accepts arrays of `Thread::Backtrace::Location`.
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`Kernel#raise`, `Thread#raise` and `Fiber#raise` also accept this new format. [[Feature #13557]]
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* Range
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* Range#size now raises TypeError if the range is not iterable. [[Misc #18984]]
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## Compatibility issues
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Note: Excluding feature bug fixes.
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* Error messages and backtrace displays have been changed.
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* Use a single quote instead of a backtick as a opening quote. [[Feature #16495]]
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* Display a class name before a method name (only when the class has a permanent name). [[Feature #19117]]
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* `Kernel#caller`, `Thread::Backtrace::Location`'s methods, etc. are also changed accordingly.
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```
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Old:
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test.rb:1:in `foo': undefined method `time' for an instance of Integer
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from test.rb:2:in `<main>'
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New:
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test.rb:1:in 'Object#foo': undefined method 'time' for an instance of Integer
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from test.rb:2:in `<main>'
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```
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## C API updates
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* `rb_newobj` and `rb_newobj_of` (and corresponding macros `RB_NEWOBJ`, `RB_NEWOBJ_OF`, `NEWOBJ`, `NEWOBJ_OF`) have been removed. [[Feature #20265]]
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* Removed deprecated function `rb_gc_force_recycle`. [[Feature #18290]]
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## Implementation improvements
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* `Array#each` is rewritten in Ruby for better performance [[Feature #20182]].
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## Miscellaneous changes
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* Passing a block to a method which doesn't use the passed block will show
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a warning on verbose mode (`-w`).
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[[Feature #15554]]
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* Redefining some core methods that are specially optimized by the interpeter
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and JIT like `String.freeze` or `Integer#+` now emits a performance class
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warning (`-W:performance` or `Warning[:performance] = true`).
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[[Feature #20429]]
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See GitHub releases like [Logger](https://github.com/ruby/logger/releases) or
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changelog for details of the default gems or bundled gems.
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See [NEWS](https://github.com/ruby/ruby/blob/{{ release.tag }}/NEWS.md)
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or [commit logs](https://github.com/ruby/ruby/compare/v3_3_0...{{ release.tag }})
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for more details.
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With those changes, [{{ release.stats.files_changed }} files changed, {{ release.stats.insertions }} insertions(+), {{ release.stats.deletions }} deletions(-)](https://github.com/ruby/ruby/compare/v3_3_0...{{ release.tag }}#file_bucket)
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since Ruby 3.3.0!
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## Download
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* <{{ release.url.gz }}>
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SIZE: {{ release.size.gz }}
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SHA1: {{ release.sha1.gz }}
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SHA256: {{ release.sha256.gz }}
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SHA512: {{ release.sha512.gz }}
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* <{{ release.url.xz }}>
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SIZE: {{ release.size.xz }}
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SHA1: {{ release.sha1.xz }}
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SHA256: {{ release.sha256.xz }}
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SHA512: {{ release.sha512.xz }}
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* <{{ release.url.zip }}>
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SIZE: {{ release.size.zip }}
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SHA1: {{ release.sha1.zip }}
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SHA256: {{ release.sha256.zip }}
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SHA512: {{ release.sha512.zip }}
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## What is Ruby
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Ruby was first developed by Matz (Yukihiro Matsumoto) in 1993,
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and is now developed as Open Source. It runs on multiple platforms
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and is used all over the world especially for web development.
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[Feature #13557]: https://bugs.ruby-lang.org/issues/13557
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[Feature #15554]: https://bugs.ruby-lang.org/issues/15554
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[Feature #16495]: https://bugs.ruby-lang.org/issues/16495
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[Feature #18290]: https://bugs.ruby-lang.org/issues/18290
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[Feature #18980]: https://bugs.ruby-lang.org/issues/18980
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[Misc #18984]: https://bugs.ruby-lang.org/issues/18984
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[Feature #19117]: https://bugs.ruby-lang.org/issues/19117
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[Bug #19918]: https://bugs.ruby-lang.org/issues/19918
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[Bug #20064]: https://bugs.ruby-lang.org/issues/20064
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[Feature #20182]: https://bugs.ruby-lang.org/issues/20182
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[Feature #20205]: https://bugs.ruby-lang.org/issues/20205
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[Bug #20218]: https://bugs.ruby-lang.org/issues/20218
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[Feature #20265]: https://bugs.ruby-lang.org/issues/20265
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[Feature #20429]: https://bugs.ruby-lang.org/issues/20429

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