turkdevops · pull · Aug 3, 2026 · Aug 2, 2026 · Aug 2, 2026 · Aug 3, 2026
diff --git a/NEWS.md b/NEWS.md
@@ -103,6 +103,13 @@ Note: We're only listing outstanding class updates.
 
 ## Stdlib updates
 
+* Psych
+
+    * An experimental libfyaml backend has been added.  It is only
+      enabled when psych is built with `--enable-libfyaml`, and the
+      default libyaml backend remains unchanged otherwise.  It is not
+      supported on Windows.  [[GH-psych #805]]
+
 ### The following bundled gems are added.
 
 
@@ -117,6 +124,14 @@ releases.
 * tsort 0.2.0
 * win32-registry 0.1.2
 
+### The following bundled gems are removed.
+
+* net-ftp 0.3.9
+* net-pop 0.1.2
+
+They are still available on rubygems.org and can be installed with
+`gem install`.  [[Feature #21835]]
+
 ### The following default gem is added.
 
 ### The following default gems are updated.
@@ -193,6 +208,14 @@ Ruby 4.0 bundled RubyGems and Bundler version 4. see the following links for det
 
 ## Supported platforms
 
+* Support code for the following platforms has been removed.  Note
+  that all of them reached end of life many years ago and Ruby has
+  long been unbuildable on them.
+
+    * Interix (Windows Services for UNIX)
+    * SunOS 4 (Solaris, i.e. SunOS 5, is unaffected)
+    * BSD/OS (BSDi)
+
 ## Compatibility issues
 
 * `Kernel#at_exit` and `END {}` now raise `Ractor::IsolationError` when called
@@ -240,6 +263,12 @@ The following APIs, which have been deprecated for many years, are removed.
 
 - The default garbage collector has been switched from a freelist allocator to a bump pointer allocator. [[PR #17201]]
 
+- The error_highlight, did_you_mean, and syntax_suggest gems are now
+  loaded lazily on the first error display instead of at interpreter
+  boot, which reduces startup time.  `Process.warmup` loads them
+  eagerly so that pre-forking servers keep their code in
+  copy-on-write shared memory.  [[Feature #21951]]
+
 ### Ractor
 
 A lot of work has gone into making Ractors more stable, performant, and usable. These improvements bring Ractor implementation closer to leaving experimental status.
@@ -254,9 +283,11 @@ A lot of work has gone into making Ractors more stable, performant, and usable.
 [Feature #21781]: https://bugs.ruby-lang.org/issues/21781
 [Feature #21785]: https://bugs.ruby-lang.org/issues/21785
 [Feature #21796]: https://bugs.ruby-lang.org/issues/21796
+[Feature #21835]: https://bugs.ruby-lang.org/issues/21835
 [Feature #21853]: https://bugs.ruby-lang.org/issues/21853
 [Feature #21861]: https://bugs.ruby-lang.org/issues/21861
 [Feature #21932]: https://bugs.ruby-lang.org/issues/21932
+[Feature #21951]: https://bugs.ruby-lang.org/issues/21951
 [Feature #21981]: https://bugs.ruby-lang.org/issues/21981
 [Feature #22097]: https://bugs.ruby-lang.org/issues/22097
 [Feature #22135]: https://bugs.ruby-lang.org/issues/22135
@@ -265,6 +296,7 @@ A lot of work has gone into making Ractors more stable, performant, and usable.
 [Feature #22175]: https://bugs.ruby-lang.org/issues/22175
 [Feature #22185]: https://bugs.ruby-lang.org/issues/22185
 [PR #17201]: https://github.com/ruby/ruby/pull/17201
+[GH-psych #805]: https://github.com/ruby/psych/pull/805
 [RubyGems-v4.0.4]: https://github.com/rubygems/rubygems/releases/tag/v4.0.4
 [RubyGems-v4.0.5]: https://github.com/rubygems/rubygems/releases/tag/v4.0.5
 [RubyGems-v4.0.6]: https://github.com/rubygems/rubygems/releases/tag/v4.0.6

diff --git a/compile.c b/compile.c
@@ -5857,7 +5857,7 @@ compile_massign_lhs(rb_iseq_t *iseq, LINK_ANCHOR *const pre, LINK_ANCHOR *const
                 ci = ci_flag_set(iseq, ci, VM_CALL_ARGS_SPLAT_MUT);
             }
             OPERAND_AT(iobj, 0) = (VALUE)ci;
-            RB_OBJ_WRITTEN(iseq, Qundef, iobj);
+            RB_OBJ_WRITTEN(iseq, Qundef, ci);
 
             /* Given: h[*a], h[*b, 1] = ary
              *  h[*a] uses splatarray false and does not set VM_CALL_ARGS_SPLAT_MUT,

diff --git a/ext/io/console/console.c b/ext/io/console/console.c
@@ -1916,14 +1916,14 @@ console_ttyname(VALUE io)
 
 typedef enum {
     platform_default,
-#if defined _WIN32 || defined __CYGWIN__
+#if defined _WIN32
     platform_cygwin,
     platform_msys,
 #endif
     platform_any,
 
     platform_default_bit = 1U << platform_default,
-#if defined _WIN32 || defined __CYGWIN__
+#if defined _WIN32
     platform_cygwin_bit = 1U << platform_cygwin,
     platform_msys_bit = 1U << platform_msys,
 #endif
@@ -1965,7 +1965,7 @@ console_platform_tty_p(int argc, VALUE *argv, VALUE io)
 	    if (m == ID2SYM(rb_intern("any"))) {
 		mode |= platform_any_bit;
 	    }
-#if defined _WIN32 || defined __CYGWIN__
+#if defined _WIN32
 	    else if (m == ID2SYM(rb_intern("cygwin"))) {
 		mode |= platform_cygwin_bit;
 	    }
@@ -1982,7 +1982,7 @@ console_platform_tty_p(int argc, VALUE *argv, VALUE io)
 	ret = rb_call_super(0, 0);
     }
     if ((mode & ~platform_default_bit) && !RTEST(ret)) {
-#if defined _WIN32 || defined __CYGWIN__
+#if defined _WIN32
 	if (mode & (platform_cygwin_bit | platform_msys_bit)) {
 	    struct {
 		FILE_NAME_INFO info;
@@ -2080,9 +2080,8 @@ InitVM_console(void)
     rb_define_method(rb_cIO, "getpass", console_getpass, -1);
     rb_define_method(rb_cIO, "ttyname", console_ttyname, 0);
     {
-	/* :stopdoc: */
+	/* :nodoc: */
 	VALUE platform = rb_define_module_under(rb_cIO, "platform_tty");
-	/* :startdoc: */
 	{
 	    VALUE rb_cIO = platform;
 	    rb_define_method(rb_cIO, "tty?", console_platform_tty_p, -1);

diff --git a/file.c b/file.c
@@ -4762,13 +4762,25 @@ s_absolute_path(int c, const VALUE * v, VALUE _)
 }
 
 /*
+ *  :markup: markdown
+ *
  *  call-seq:
- *     File.absolute_path?(file_name)  ->  true or false
+ *    File.absolute_path?(path) -> true or false
  *
- *  Returns <code>true</code> if +file_name+ is an absolute path, and
- *  <code>false</code> otherwise.
+ *  Returns whether the given `path` is an absolute path:
+ *
+ *  ```ruby
+ *  File.absolute_path?('/home') # => true
+ *  File.absolute_path?('lib')   # => false
+ *  ```
+ *
+ *  The result is OS-dependent for some paths:
+ *
+ *  ```ruby
+ *  File.absolute_path?('C:/')   # => true   # On Windows.
+ *  File.absolute_path?('C:/')   # => false  # Elsewhere.
+ *  ```
  *
- *     File.absolute_path?("c:/foo")     #=> false (on Linux), true (on Windows)
  */
 
 static VALUE

diff --git a/gc.rb b/gc.rb
@@ -12,28 +12,28 @@ module GC
   # Keyword arguments:
   #
   # - +full_mark+:
-  #   its boolean value determines whether to perform a major garbage collection cycle:
+  #   a boolean value specifying whether to perform a major garbage collection cycle:
   #
   #   - +true+: initiates a major garbage collection cycle,
   #     meaning all objects (old and new) are marked.
   #   - +false+: initiates a minor garbage collection cycle,
   #     meaning only young objects are marked.
   #
   # - +immediate_mark+:
-  #   its boolean value determines whether to perform incremental marking:
+  #   a boolean value specifying whether marking is performed incrementally:
   #
   #   - +true+: marking is completed before the method returns.
-  #   - +false+: marking is performed by parts,
+  #   - +false+: marking is performed in parts,
   #     interleaved with program execution both before the method returns and afterward;
   #     therefore marking may not be completed before the return.
-  #     Note that if +full_mark+ is +false+, marking will always be immediate,
+  #     Note that if +full_mark+ is +false+, marking is always immediate,
   #     regardless of the value of +immediate_mark+.
   #
   # - +immediate_sweep+:
-  #   its boolean value determines whether to defer sweeping (using lazy sweep):
+  #   a boolean value specifying whether sweeping is deferred (lazy sweep):
   #
   #   - +true+: sweeping is completed before the method returns.
-  #   - +false+: sweeping is performed by parts,
+  #   - +false+: sweeping is performed in parts,
   #     interleaved with program execution both before the method returns and afterward;
   #     therefore sweeping may not be completed before the return.
   #

diff --git a/lib/bundler/bundler.gemspec b/lib/bundler/bundler.gemspec
@@ -36,11 +36,12 @@ Gem::Specification.new do |s|
 
   s.files = Dir.glob("lib/bundler{.rb,/**/*}", File::FNM_DOTMATCH).reject {|f| File.directory?(f) }
 
-  # Bundler reuses RubyGems' vendored URI and SecureRandom. Ship a copy under
-  # lib/rubygems so Bundler stays self-contained on RubyGems versions that
-  # predate them.
+  # Bundler reuses RubyGems' vendored URI and SecureRandom and its pure-Ruby
+  # YAML serializer. Ship a copy under lib/rubygems so Bundler stays
+  # self-contained on RubyGems versions that predate them.
   s.files += Dir.glob("lib/rubygems/vendor/uri/**/*", File::FNM_DOTMATCH).reject {|f| File.directory?(f) }
   s.files += Dir.glob("lib/rubygems/vendor/securerandom/**/*", File::FNM_DOTMATCH).reject {|f| File.directory?(f) }
+  s.files += Dir.glob("lib/rubygems/yaml_serializer.rb")
 
   # include the gemspec itself because warbler breaks w/o it
   s.files += %w[lib/bundler/bundler.gemspec]

diff --git a/lib/bundler/plugin/index.rb b/lib/bundler/plugin/index.rb
@@ -171,14 +171,16 @@ def load_index(index_file, global = false)
 
           data = index_f.read
 
-          require_relative "../yaml_serializer"
-          index = YAMLSerializer.load(data)
+          require "rubygems/yaml_serializer"
+          # Empty sections load as nil, e.g. from index files written by
+          # older Bundler versions, which dumped empty hashes as a bare key.
+          index = Gem::YAMLSerializer.load(data) || {}
 
-          @commands.merge!(index["commands"])
-          @hooks.merge!(index["hooks"])
+          @commands.merge!(index["commands"] || {})
+          @hooks.merge!(index["hooks"] || {})
           @load_paths.merge!(transform_index_paths(index["load_paths"]) {|p| absolutize_path(p, base) })
           @plugin_paths.merge!(transform_index_paths(index["plugin_paths"]) {|p| absolutize_path(p, base) })
-          @sources.merge!(index["sources"]) unless global
+          @sources.merge!(index["sources"] || {}) unless global
         end
       end
 
@@ -196,10 +198,10 @@ def save_index
           "sources" => @sources,
         }
 
-        require_relative "../yaml_serializer"
+        require "rubygems/yaml_serializer"
         SharedHelpers.filesystem_access(index_file) do |index_f|
           FileUtils.mkdir_p(index_f.dirname)
-          File.open(index_f, "w") {|f| f.puts YAMLSerializer.dump(index) }
+          File.open(index_f, "w") {|f| f.puts Gem::YAMLSerializer.dump(index) }
         end
       end
 

diff --git a/lib/bundler/settings.rb b/lib/bundler/settings.rb
@@ -504,12 +504,10 @@ def load_config(config_file)
     end
 
     def serializer_class
+      # The Bundler gem ships its own copy of Gem::YAMLSerializer, so this
+      # resolves even on RubyGems versions that predate it.
       require "rubygems/yaml_serializer"
       Gem::YAMLSerializer
-    rescue LoadError
-      # TODO: Remove this when RubyGems 3.4 is EOL
-      require_relative "yaml_serializer"
-      YAMLSerializer
     end
 
     FALLBACK_TIMEOUT_URI_OPTION = "fallback_timeout"

diff --git a/lib/bundler/yaml_serializer.rb b/lib/bundler/yaml_serializer.rb
diff --git a/lib/rubygems/commands/cert_command.rb b/lib/rubygems/commands/cert_command.rb
@@ -96,8 +96,6 @@ def open_private_key(key_file)
     check_openssl
     passphrase = ENV["GEM_PRIVATE_KEY_PASSPHRASE"]
     key = OpenSSL::PKey.read File.read(key_file), passphrase
-    raise Gem::OptionParser::InvalidArgument,
-      "#{key_file}: private key not found" unless key.private?
     key
   rescue Errno::ENOENT
     raise Gem::OptionParser::InvalidArgument, "#{key_file}: does not exist"
@@ -161,7 +159,7 @@ def build_cert(email, key) # :nodoc:
       Gem::Security::ONE_DAY * expiration_length_days
     )
 
-    Gem::Security.write cert, "gem-public_cert.pem"
+    Gem::Security.write_certificate cert, "gem-public_cert.pem"
   end
 
   def build_key # :nodoc:
@@ -178,7 +176,7 @@ def build_key # :nodoc:
 
     algorithm = options[:key_algorithm] || Gem::Security::DEFAULT_KEY_ALGORITHM
     key = Gem::Security.create_key(algorithm)
-    key_path = Gem::Security.write key, "gem-private_key.pem", 0o600, passphrase
+    key_path = Gem::Security.write_private_key key, "gem-private_key.pem", 0o600, passphrase
 
     [key, key_path]
   end
@@ -298,7 +296,7 @@ def sign(cert_file)
 
     cert = Gem::Security.sign cert, issuer_key, issuer_cert
 
-    Gem::Security.write cert, cert_file, permissions
+    Gem::Security.write_certificate cert, cert_file, permissions
   end
 
   def sign_certificates # :nodoc: