[pull] master from ruby:master

NEWS.md

@@ -64,6 +64,12 @@ Note: We're only listing outstanding class updates.
       Also, `Binding#local_variable_get` and `Binding#local_variable_set` reject
       to handle numbered parameters.  [[Bug #21049]]
 
+* File
+
+    * `File::Stat#birthtime` is now available on Linux via the statx
+      system call when supported by the kernel and filesystem.
+      [[Feature #21205]]
+
 * IO
 
     * `IO.select` accepts `Float::INFINITY` as a timeout argument.
@@ -76,10 +82,20 @@ Note: We're only listing outstanding class updates.
 
     * `Math.log1p` and `Math.expm1` are added. [[Feature #21527]]
 
-* Socket
+* Method
 
-    * `Socket.tcp` & `TCPSocket.new` accepts `open_timeout` as a keyword argument to specify
-      the timeout for the initial connection. [[Feature #21347]]
+    * `Method#source_location`, `Proc#source_location`, and
+      `UnboundMethod#source_location` now return extended location
+      information with 5 elements: `[path, start_line, start_column,
+      end_line, end_column]`. The previous 2-element format `[path,
+      line]` can still be obtained by calling `.take(2)` on the result.
+      [[Feature #6012]]
+
+* Proc
+
+    * `Proc#parameters` now shows anonymous optional parameters as `[:opt]`
+      instead of `[:opt, nil]`, making the output consistent with when the
+      anonymous parameter is required. [[Bug #20974]]
 
 * Ractor
 
@@ -127,11 +143,41 @@ Note: We're only listing outstanding class updates.
       to make shareable Proc or lambda.
       [[Feature #21550]], [[Feature #21557]]
 
-* `Set`
+* Range
+
+    * `Range#to_set` and `Enumerator#to_set` now perform size checks to prevent
+      issues with endless ranges. [[Bug #21654]]
+
+    * `Range#overlap?` now correctly handles infinite (unbounded) ranges.
+      [[Bug #21185]]
+
+    * `Range#max` behavior on beginless integer ranges has been fixed.
+      [[Bug #21174]] [[Bug #21175]]
+
+* Ruby
+
+    * A new toplevel module `Ruby` has been defined, which contains
+      Ruby-related constants. This module was reserved in Ruby 3.4
+      and is now officially defined. [[Feature #20884]]
+
+* Set
 
     * `Set` is now a core class, instead of an autoloaded stdlib class.
       [[Feature #21216]]
 
+    * `Set#inspect` now returns a string suitable for `eval`, using the
+      `Set[]` syntax (e.g., `Set[1, 2, 3]` instead of
+      `#<Set: {1, 2, 3}>`). This makes it consistent with other core
+      collection classes like Array and Hash. [[Feature #21389]]
+
+    * Passing arguments to `Set#to_set` and `Enumerable#to_set` is now deprecated.
+      [[Feature #21390]]
+
+* Socket
+
+    * `Socket.tcp` & `TCPSocket.new` accepts an `open_timeout` keyword argument to specify
+      the timeout for the initial connection. [[Feature #21347]]
+
 * String
 
     * Update Unicode to Version 17.0.0 and Emoji Version 17.0.
@@ -240,6 +286,11 @@ The following bundled gems are updated.
 
 ## Supported platforms
 
+* Windows
+
+    * Dropped support for MSVC versions older than 14.0 (_MSC_VER 1900).
+      This means Visual Studio 2015 or later is now required.
+
 ## Compatibility issues
 
 * The following methods were removed from Ractor due to the addition of `Ractor::Port`:
@@ -253,6 +304,14 @@ The following bundled gems are updated.
 
 * `ObjectSpace._id2ref` is deprecated. [[Feature #15408]]
 
+* `Process::Status#&` and `Process::Status#>>` have been removed.
+  They were deprecated in Ruby 3.3. [[Bug #19868]]
+
+* `rb_path_check` has been removed. This function was used for
+  `$SAFE` path checking which was removed in Ruby 2.7,
+  and was already deprecated,.
+  [[Feature #20971]]
+
 ## Stdlib compatibility issues
 
 * CGI library is removed from the default gems. Now we only provide `cgi/escape` for
@@ -283,6 +342,20 @@ The following bundled gems are updated.
       `IO` objects share the same file descriptor, closing one does not affect
       the other. [[Feature #18455]]
 
+* Set
+
+    * A C API for `Set` has been added. The following methods are supported:
+      [[Feature #21459]]
+
+        * `rb_set_foreach`
+        * `rb_set_new`
+        * `rb_set_new_capa`
+        * `rb_set_lookup`
+        * `rb_set_add`
+        * `rb_set_clear`
+        * `rb_set_delete`
+        * `rb_set_size`
+
 ## Implementation improvements
 
 ### Ractor
@@ -320,17 +393,26 @@ A lot of work has gone into making Ractors more stable, performant, and usable.
     * `--rjit` is removed. We will move the implementation of the third-party JIT API
       to the [ruby/rjit](https://github.com/ruby/rjit) repository.
 
+[Feature #6012]: https://bugs.ruby-lang.org/issues/6012
 [Feature #15408]: https://bugs.ruby-lang.org/issues/15408
 [Feature #17473]: https://bugs.ruby-lang.org/issues/17473
 [Feature #18455]: https://bugs.ruby-lang.org/issues/18455
 [Feature #19630]: https://bugs.ruby-lang.org/issues/19630
+[Bug #19868]:     https://bugs.ruby-lang.org/issues/19868
 [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 #20884]: https://bugs.ruby-lang.org/issues/20884
 [Feature #20925]: https://bugs.ruby-lang.org/issues/20925
+[Feature #20971]: https://bugs.ruby-lang.org/issues/20971
+[Bug #20974]:     https://bugs.ruby-lang.org/issues/20974
 [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
+[Bug #21174]:     https://bugs.ruby-lang.org/issues/21174
+[Bug #21175]:     https://bugs.ruby-lang.org/issues/21175
+[Bug #21185]:     https://bugs.ruby-lang.org/issues/21185
+[Feature #21205]: https://bugs.ruby-lang.org/issues/21205
 [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
@@ -339,6 +421,10 @@ A lot of work has gone into making Ractors more stable, performant, and usable.
 [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
+[Feature #21389]: https://bugs.ruby-lang.org/issues/21389
+[Feature #21390]: https://bugs.ruby-lang.org/issues/21390
+[Feature #21459]: https://bugs.ruby-lang.org/issues/21459
 [Feature #21527]: https://bugs.ruby-lang.org/issues/21527
 [Feature #21550]: https://bugs.ruby-lang.org/issues/21550
 [Feature #21557]: https://bugs.ruby-lang.org/issues/21557
+[Bug #21654]:     https://bugs.ruby-lang.org/issues/21654

bootstraptest/test_ractor.rb

@@ -157,6 +157,16 @@
   Ractor.shareable_proc(&closure).call
 }
 
+# Ractor.make_shareable makes a copy of given Proc
+assert_equal '[true, true]', %q{
+  pr1 = Proc.new do
+    self
+  end
+  pr2 = Ractor.shareable_proc(&pr1)
+
+  [pr1.call == self, pr2.call == nil]
+}
+
 # Ractor::IsolationError cases
 assert_equal '3', %q{
   ok = 0

cont.c

@@ -3371,6 +3371,8 @@ rb_fiber_atfork(rb_thread_t *th)
             th->root_fiber = th->ec->fiber_ptr;
         }
         th->root_fiber->prev = 0;
+        th->root_fiber->blocking = 1;
+        th->blocking = 1;
     }
 }
 #endif

ractor.c

@@ -2376,7 +2376,7 @@ ractor_shareable_proc(rb_execution_context_t *ec, VALUE replace_self, bool is_la
     }
     else {
         VALUE proc = is_lambda ? rb_block_lambda() : rb_block_proc();
-        return rb_proc_ractor_make_shareable(proc, replace_self);
+        return rb_proc_ractor_make_shareable(rb_proc_dup(proc), replace_self);
     }
 }
 

spec/bundler/spec_helper.rb

@@ -145,5 +145,5 @@ def self.ruby=(ruby)
     if metadata[:type] != :aruba && metadata.keys.none? {|k| Spec::WindowsTagGroup::EXAMPLE_MAPPINGS.keys.include?(k) }
       warn "#{metadata[:file_path]} is not assigned to any Windows runner group. see spec/support/windows_tag_group.rb for details."
     end
-  end
+  end unless Spec::Path.ruby_core?
 end

test/fiber/test_scheduler.rb

@@ -226,4 +226,61 @@ def test_condition_variable
     thread.join
     assert_kind_of RuntimeError, error
   end
+
+  def test_post_fork_scheduler_reset
+    omit 'fork not supported' unless Process.respond_to?(:fork)
+
+    forked_scheduler_state = nil
+    thread = Thread.new do
+      r, w = IO.pipe
+      scheduler = Scheduler.new
+      Fiber.set_scheduler scheduler
+
+      forked_pid = fork do
+        r.close
+        w << (Fiber.scheduler ? 'set' : 'reset')
+        w.close
+      end
+      w.close
+      forked_scheduler_state = r.read
+      Process.wait(forked_pid)
+    ensure
+      r.close rescue nil
+      w.close rescue nil
+    end
+    thread.join
+    assert_equal 'reset', forked_scheduler_state
+  ensure
+    thread.kill rescue nil
+  end
+
+  def test_post_fork_fiber_blocking
+    omit 'fork not supported' unless Process.respond_to?(:fork)
+
+    fiber_blocking_state = nil
+    thread = Thread.new do
+      r, w = IO.pipe
+      scheduler = Scheduler.new
+      Fiber.set_scheduler scheduler
+
+      forked_pid = nil
+      Fiber.schedule do
+        forked_pid = fork do
+          r.close
+          w << (Fiber.current.blocking? ? 'blocking' : 'nonblocking')
+          w.close
+        end
+      end
+      w.close
+      fiber_blocking_state = r.read
+      Process.wait(forked_pid)
+    ensure
+      r.close rescue nil
+      w.close rescue nil
+    end
+    thread.join
+    assert_equal 'blocking', fiber_blocking_state
+  ensure
+    thread.kill rescue nil
+  end
 end

thread.c

@@ -4997,6 +4997,7 @@ rb_thread_atfork(void)
     rb_threadptr_pending_interrupt_clear(th);
     rb_thread_atfork_internal(th, terminate_atfork_i);
     th->join_list = NULL;
+    th->scheduler = Qnil;
     rb_fiber_atfork(th);
 
     /* We don't want reproduce CVE-2003-0900. */