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ruby/NEWS.md
Samuel Williams 64f508ade8
Support cause: in Thread#raise and Fiber#raise. (#13967) 
* Add support for `cause:` argument to `Fiber#raise` and `Thread#raise`.

The implementation behaviour is consistent with `Kernel#raise` and
`Exception#initialize` methods, allowing the `cause:` argument to be
passed to `Fiber#raise` and `Thread#raise`. This change ensures that
the `cause:` argument is handled correctly, providing a more consistent
and expected behavior when raising exceptions in fibers and threads.

[Feature #21360]

* Shared specs for Fiber/Thread/Kernel raise.

---------

Co-authored-by: Samuel Williams <samuel.williams@shopify.com>
2025-07-24 14:45:43 +12:00

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# NEWS for Ruby 3.5.0
This document is a list of user-visible feature changes
since the **3.4.0** release, except for bug fixes.
Note that each entry is kept to a minimum, see links for details.
## Language changes
* `*nil` no longer calls `nil.to_a`, similar to how `**nil` does
not call `nil.to_hash`. [[Feature #21047]]
## Core classes updates
Note: We're only listing outstanding class updates.
* Kernel
* `Kernel#inspect` now checks for the existence of a `#instance_variables_to_inspect` method,
allowing control over which instance variables are displayed in the `#inspect` string:
```ruby
class DatabaseConfig
def initialize(host, user, password)
@host = host
@user = user
@password = password
end
private def instance_variables_to_inspect = [:@host, :@user]
end
conf = DatabaseConfig.new("localhost", "root", "hunter2")
conf.inspect #=> #<DatabaseConfig:0x0000000104def350 @host="localhost", @user="root">
```
[[Feature #21219]]
* Binding
* `Binding#local_variables` does no longer include numbered parameters.
Also, `Binding#local_variable_get` and `Binding#local_variable_set` reject
to handle numbered parameters. [[Bug #21049]]
* IO
* `IO.select` accepts +Float::INFINITY+ as a timeout argument.
[[Feature #20610]]
* Socket
* `Socket.tcp` & `TCPSocket.new` accepts `open_timeout` as a keyword argument to specify
the timeout for the initial connection. [[Feature #21347]]
* Ractor
* `Ractor::Port` class was added for a new synchronization mechanism
to communicate between Ractors. [[Feature #21262]]
```ruby
port1 = Ractor::Port.new
port2 = Ractor::Port.new
Ractor.new port1, port2 do |port1, port2|
port1 << 1
port2 << 11
port1 << 2
port2 << 12
end
2.times{ p port1.receive } #=> 1, 2
2.times{ p port2.receive } #=> 11, 12
```
`Ractor::Port` provides the following methods:
* `Ractor::Port#receive`
* `Ractor::Port#send` (or `Ractor::Port#<<`)
* `Ractor::Port#close`
* `Ractor::Port#closed?`
As result, `Ractor.yield` and `Ractor#take` were removed.
* `Ractor#join` and `Ractor#value` were added to wait for the
termination of a Ractor. These are similar to `Thread#join`
and `Thread#value`.
* `Ractor#monitor` and `Ractor#unmonitor` were added as low-level
interfaces used internally to implement `Ractor#join`.
* `Ractor.select` now only accepts Ractors and Ports. If Ractors are given,
it returns when a Ractor terminates.
* `Ractor#default_port` was added. Each `Ractor` has a default port,
which is used by `Ractor.send`, `Ractor.receive`.
* `Ractor#close_incoming` and `Ractor#close_outgoing` were removed.
* Set
* Set is now a core class, instead of an autoloaded stdlib class.
[[Feature #21216]]
* String
* Update Unicode to Version 16.0.0 and Emoji Version 16.0.
[[Feature #19908]][[Feature #20724]] (also applies to Regexp)
* Thread
* Introduce support for `Thread#raise(cause:)` argument similar to
`Kernel#raise`. [[Feature #21360]]
* Fiber
* Introduce support for `Fiber#raise(cause:)` argument similar to
`Kernel#raise`. [[Feature #21360]]
* Fiber::Scheduler
* Introduce `Fiber::Scheduler#fiber_interrupt` to interrupt a fiber with a
given exception. The initial use case is to interrupt a fiber that is
waiting on a blocking IO operation when the IO operation is closed.
[[Feature #21166]]
* Pathname
* Pathname has been promoted from a default gem to a core class of Ruby.
[[Feature #17473]]
## Stdlib updates
The following bundled gems are promoted from default gems.
* ostruct 0.6.3
* pstore 0.2.0
* benchmark 0.4.1
* logger 1.7.0
* rdoc 6.14.2
* win32ole 1.9.2
* irb 1.15.2
* reline 0.6.2
* readline 0.0.4
* fiddle 1.1.8
We only list stdlib changes that are notable feature changes.
Other changes are listed in the following sections. We also listed release
history from the previous bundled version that is Ruby 3.3.0 if it has GitHub
releases.
The following default gem is added.
* win32-registry 0.1.0
The following default gems are updated.
* RubyGems 3.8.0.dev
* bundler 2.8.0.dev
* erb 5.0.2
* etc 1.4.6
* io-console 0.8.1
* io-nonblock 0.3.2
* io-wait 0.3.2
* json 2.13.0
* optparse 0.7.0.dev.2
* prism 1.4.0
* psych 5.2.6
* resolv 0.6.2
* stringio 3.1.8.dev
* strscan 3.1.6.dev
* uri 1.0.3
* weakref 0.1.4
The following bundled gems are added.
The following bundled gems are updated.
* minitest 5.25.5
* rake 13.3.0
* test-unit 3.7.0
* rexml 3.4.1
* net-imap 0.5.9
* net-smtp 0.5.1
* matrix 0.4.3
* prime 0.1.4
* rbs 3.9.4
* debug 1.11.0
* base64 0.3.0
* bigdecimal 3.2.2
* drb 2.2.3
* syslog 0.3.0
* csv 3.3.5
* repl_type_completor 0.1.11
## Supported platforms
## Compatibility issues
* The following methods were removed from Ractor due because of `Ractor::Port`:
* `Ractor.yield`
* `Ractor#take`
* `Ractor#close_incoming`
* `Ractor#close_outgoging`
[[Feature #21262]]
## Stdlib compatibility issues
* CGI library is removed from the default gems. Now we only provide `cgi/escape` for
the following methods:
* `CGI.escape` and `CGI.unescape`
* `CGI.escapeHTML` and `CGI.unescapeHTML`
* `CGI.escapeURIComponent` and `CGI.unescapeURIComponent`
* `CGI.escapeElement` and `CGI.unescapeElement`
[[Feature #21258]]
* With the move of `Set` from stdlib to core class, `set/sorted_set.rb` has
been removed, and `SortedSet` is no longer an autoloaded constant. Please
install the `sorted_set` gem and `require 'sorted_set'` to use `SortedSet`.
[[Feature #21287]]
## C API updates
* IO
* `rb_thread_fd_close` is deprecated and now a no-op. If you need to expose
file descriptors from C extensions to Ruby code, create an `IO` instance
using `RUBY_IO_MODE_EXTERNAL` and use `rb_io_close(io)` to close it (this
also interrupts and waits for all pending operations on the `IO`
instance). Directly closing file descriptors does not interrupt pending
operations, and may lead to undefined behaviour. In other words, if two
`IO` objects share the same file descriptor, closing one does not affect
the other. [[Feature #18455]]
## Implementation improvements
## JIT
[Feature #17473]: https://bugs.ruby-lang.org/issues/17473
[Feature #18455]: https://bugs.ruby-lang.org/issues/18455
[Feature #19908]: https://bugs.ruby-lang.org/issues/19908
[Feature #20610]: https://bugs.ruby-lang.org/issues/20610
[Feature #20724]: https://bugs.ruby-lang.org/issues/20724
[Feature #21047]: https://bugs.ruby-lang.org/issues/21047
[Bug #21049]: https://bugs.ruby-lang.org/issues/21049
[Feature #21166]: https://bugs.ruby-lang.org/issues/21166
[Feature #21216]: https://bugs.ruby-lang.org/issues/21216
[Feature #21219]: https://bugs.ruby-lang.org/issues/21219
[Feature #21258]: https://bugs.ruby-lang.org/issues/21258
[Feature #21262]: https://bugs.ruby-lang.org/issues/21262
[Feature #21287]: https://bugs.ruby-lang.org/issues/21287
[Feature #21347]: https://bugs.ruby-lang.org/issues/21347
[Feature #21360]: https://bugs.ruby-lang.org/issues/21360
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