Copy from en

Author: riseshia

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

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