Merge pull request #7022 from Homebrew/dependabot/bundler/Library/Homebrew/concurrent-ruby-1.1.6

build: bump concurrent-ruby from 1.1.5 to 1.1.6 in /Library/Homebrew

Library/.rubocop_rspec.yml

@@ -26,6 +26,10 @@ RSpec/LeakyConstantDeclaration:
   Enabled: false
 RSpec/MessageSpies:
   Enabled: false
+RSpec/RepeatedDescription:
+  Enabled: false
+RSpec/RepeatedExampleGroupDescription:
+  Enabled: false
 
 # TODO: try to reduce these (also requires fixing Homebrew/bundle)
 RSpec/ExampleLength:

Library/Homebrew/Gemfile.lock

@@ -8,7 +8,7 @@ GEM
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2)
     ast (2.4.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     connection_pool (2.2.2)
     coveralls (0.8.23)
       json (>= 1.8, < 3)
@@ -89,7 +89,7 @@ GEM
       unicode-display_width (>= 1.4.0, < 1.7)
     rubocop-performance (1.5.2)
       rubocop (>= 0.71.0)
-    rubocop-rspec (1.37.1)
+    rubocop-rspec (1.38.0)
       rubocop (>= 0.68.1)
     ruby-macho (2.2.0)
     ruby-progressbar (1.10.1)

Library/Homebrew/vendor/bundle/bundler/setup.rb

@@ -3,9 +3,9 @@ require 'rbconfig'
 ruby_engine = defined?(RUBY_ENGINE) ? RUBY_ENGINE : 'ruby'
 ruby_version = RbConfig::CONFIG["ruby_version"]
 path = File.expand_path('..', __FILE__)
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/concurrent-ruby-1.1.5/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/i18n-1.8.2/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/minitest-5.13.0/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/minitest-5.14.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/thread_safe-0.3.6/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/tzinfo-1.2.6/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/zeitwerk-2.2.2/lib"
@@ -19,7 +19,7 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/docile-1.3.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/simplecov-html-0.10.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/simplecov-0.16.1/lib"
 $:.unshift "#{path}/../../../../../../../../Library/Ruby/Gems/2.6.0/gems/sync-0.5.0/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/tins-1.24.0/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/tins-1.24.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/term-ansicolor-1.7.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/thor-1.0.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/coveralls-0.8.23/lib"
@@ -45,7 +45,7 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/webrobots-0.1.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/mechanize-2.7.6/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/mustache-1.1.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel-1.19.1/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel_tests-2.30.0/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel_tests-2.31.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parser-2.7.0.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/plist-3.5.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rainbow-3.0.0/lib"
@@ -61,8 +61,8 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rspec-its-1.3.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rspec-retry-0.6.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rspec-wait-0.0.9/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-progressbar-1.10.1/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/unicode-display_width-1.6.0/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/unicode-display_width-1.6.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-0.79.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-performance-1.5.2/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-rspec-1.37.1/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-rspec-1.38.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-macho-2.2.0/lib"

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.5/lib/concurrent/utility/at_exit.rb

@@ -1,97 +0,0 @@
-require 'logger'
-require 'concurrent/synchronization'
-
-module Concurrent
-
-  # Provides ability to add and remove handlers to be run at `Kernel#at_exit`, order is undefined.
-  # Each handler is executed at most once.
-  #
-  # @!visibility private
-  class AtExitImplementation < Synchronization::LockableObject
-    include Logger::Severity
-
-    def initialize(*args)
-      super()
-      synchronize { ns_initialize(*args) }
-    end
-
-    # Add a handler to be run at `Kernel#at_exit`
-    # @param [Object] handler_id optionally provide an id, if already present, handler is replaced
-    # @yield the handler
-    # @return id of the handler
-    def add(handler_id = nil, &handler)
-      id = handler_id || handler.object_id
-      synchronize { @handlers[id] = handler }
-      id
-    end
-
-    # Delete a handler by handler_id
-    # @return [true, false]
-    def delete(handler_id)
-      !!synchronize { @handlers.delete handler_id }
-    end
-
-    # Is handler with handler_id rpesent?
-    # @return [true, false]
-    def handler?(handler_id)
-      synchronize { @handlers.key? handler_id }
-    end
-
-    # @return copy of the handlers
-    def handlers
-      synchronize { @handlers }.clone
-    end
-
-    # install `Kernel#at_exit` callback to execute added handlers
-    def install
-      synchronize do
-        @installed ||= begin
-                         at_exit { runner }
-                         true
-                       end
-        self
-      end
-    end
-
-    # Will it run during `Kernel#at_exit`
-    def enabled?
-      synchronize { @enabled }
-    end
-
-    # Configure if it runs during `Kernel#at_exit`
-    def enabled=(value)
-      synchronize { @enabled = value }
-    end
-
-    # run the handlers manually
-    # @return ids of the handlers
-    def run
-      handlers, _ = synchronize { handlers, @handlers = @handlers, {} }
-      handlers.each do |_, handler|
-        begin
-          handler.call
-        rescue => error
-          Concurrent.global_logger.call(ERROR, error)
-        end
-      end
-      handlers.keys
-    end
-
-    private
-
-    def ns_initialize(enabled = true)
-      @handlers = {}
-      @enabled  = enabled
-    end
-
-    def runner
-      run if synchronize { @enabled }
-    end
-  end
-
-  private_constant :AtExitImplementation
-
-  # @see AtExitImplementation
-  # @!visibility private
-  AtExit = AtExitImplementation.new.install
-end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.5/lib/concurrent/version.rb

@@ -1,3 +0,0 @@
-module Concurrent
-  VERSION      = '1.1.5'
-end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/atom.rb

@@ -18,7 +18,7 @@ require 'concurrent/synchronization'
 #     uncoordinated, *synchronous* change of individual values. Best used when
 #     the value will undergo frequent reads but only occasional, though complex,
 #     updates. Suitable when the result of an update must be known immediately.
-#   * *{Concurrent::AtomicReference}:* A simple object reference that can be
+#   * *{Concurrent::AtomicReference}:* A simple object reference that can be updated
 #     atomically. Updates are synchronous but fast. Best used when updates a
 #     simple set operations. Not suitable when updates are complex.
 #     {Concurrent::AtomicBoolean} and {Concurrent::AtomicFixnum} are similar

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/atomic/atomic_boolean.rb

@@ -41,13 +41,13 @@ module Concurrent
   #
   #   Explicitly sets the value to true.
   #
-  #   @return [Boolean] true is value has changed, otherwise false
+  #   @return [Boolean] true if value has changed, otherwise false
 
   # @!macro atomic_boolean_method_make_false
   #
   #   Explicitly sets the value to false.
   #
-  #   @return [Boolean] true is value has changed, otherwise false
+  #   @return [Boolean] true if value has changed, otherwise false
 
   ###################################################################
 

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/atomic/count_down_latch.rb

@@ -1,6 +1,6 @@
+require 'concurrent/utility/engine'
 require 'concurrent/atomic/mutex_count_down_latch'
 require 'concurrent/atomic/java_count_down_latch'
-require 'concurrent/utility/engine'
 
 module Concurrent
 

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/atomic/ruby_thread_local_var.rb

@@ -32,12 +32,38 @@ module Concurrent
     FREE   = []
     LOCK   = Mutex.new
     ARRAYS = {} # used as a hash set
+    # noinspection RubyClassVariableUsageInspection
     @@next = 0
-    private_constant :FREE, :LOCK, :ARRAYS
+    QUEUE  = Queue.new
+    THREAD = Thread.new do
+      while true
+        method, i = QUEUE.pop
+        case method
+        when :thread_local_finalizer
+          LOCK.synchronize do
+            FREE.push(i)
+            # The cost of GC'ing a TLV is linear in the number of threads using TLVs
+            # But that is natural! More threads means more storage is used per TLV
+            # So naturally more CPU time is required to free more storage
+            ARRAYS.each_value do |array|
+              array[i] = nil
+            end
+          end
+        when :thread_finalizer
+          LOCK.synchronize do
+            # The thread which used this thread-local array is now gone
+            # So don't hold onto a reference to the array (thus blocking GC)
+            ARRAYS.delete(i)
+          end
+        end
+      end
+    end
+
+    private_constant :FREE, :LOCK, :ARRAYS, :QUEUE, :THREAD
 
     # @!macro thread_local_var_method_get
     def value
-      if array = get_threadlocal_array
+      if (array = get_threadlocal_array)
         value = array[@index]
         if value.nil?
           default
@@ -57,10 +83,10 @@ module Concurrent
       # We could keep the thread-local arrays in a hash, keyed by Thread
       # But why? That would require locking
       # Using Ruby's built-in thread-local storage is faster
-      unless array = get_threadlocal_array(me)
+      unless (array = get_threadlocal_array(me))
         array = set_threadlocal_array([], me)
         LOCK.synchronize { ARRAYS[array.object_id] = array }
-        ObjectSpace.define_finalizer(me, self.class.thread_finalizer(array))
+        ObjectSpace.define_finalizer(me, self.class.thread_finalizer(array.object_id))
       end
       array[@index] = (value.nil? ? NULL : value)
       value
@@ -69,6 +95,7 @@ module Concurrent
     protected
 
     # @!visibility private
+    # noinspection RubyClassVariableUsageInspection
     def allocate_storage
       @index = LOCK.synchronize do
         FREE.pop || begin
@@ -77,37 +104,19 @@ module Concurrent
           result
         end
       end
-      ObjectSpace.define_finalizer(self, self.class.threadlocal_finalizer(@index))
+      ObjectSpace.define_finalizer(self, self.class.thread_local_finalizer(@index))
     end
 
     # @!visibility private
-    def self.threadlocal_finalizer(index)
-      proc do
-        Thread.new do # avoid error: can't be called from trap context
-          LOCK.synchronize do
-            FREE.push(index)
-            # The cost of GC'ing a TLV is linear in the number of threads using TLVs
-            # But that is natural! More threads means more storage is used per TLV
-            # So naturally more CPU time is required to free more storage
-            ARRAYS.each_value do |array|
-              array[index] = nil
-            end
-          end
-        end
-      end
+    def self.thread_local_finalizer(index)
+      # avoid error: can't be called from trap context
+      proc { QUEUE.push [:thread_local_finalizer, index] }
     end
 
     # @!visibility private
-    def self.thread_finalizer(array)
-      proc do
-        Thread.new do # avoid error: can't be called from trap context
-          LOCK.synchronize do
-            # The thread which used this thread-local array is now gone
-            # So don't hold onto a reference to the array (thus blocking GC)
-            ARRAYS.delete(array.object_id)
-          end
-        end
-      end
+    def self.thread_finalizer(id)
+      # avoid error: can't be called from trap context
+      proc { QUEUE.push [:thread_finalizer, id] }
     end
 
     private
@@ -136,21 +145,22 @@ module Concurrent
     # This exists only for use in testing
     # @!visibility private
     def value_for(thread)
-      if array = get_threadlocal_array(thread)
+      if (array = get_threadlocal_array(thread))
         value = array[@index]
         if value.nil?
-          default_for(thread)
+          get_default
         elsif value.equal?(NULL)
           nil
         else
           value
         end
       else
-        default_for(thread)
+        get_default
       end
     end
 
-    def default_for(thread)
+    # @!visibility private
+    def get_default
       if @default_block
         raise "Cannot use default_for with default block"
       else

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/atomic/thread_local_var.rb

@@ -1,6 +1,6 @@
+require 'concurrent/utility/engine'
 require 'concurrent/atomic/ruby_thread_local_var'
 require 'concurrent/atomic/java_thread_local_var'
-require 'concurrent/utility/engine'
 
 module Concurrent
 

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/collection/non_concurrent_priority_queue.rb

@@ -1,6 +1,6 @@
+require 'concurrent/utility/engine'
 require 'concurrent/collection/java_non_concurrent_priority_queue'
 require 'concurrent/collection/ruby_non_concurrent_priority_queue'
-require 'concurrent/utility/engine'
 
 module Concurrent
   module Collection

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/configuration.rb

@@ -3,13 +3,14 @@ require 'concurrent/delay'
 require 'concurrent/errors'
 require 'concurrent/atomic/atomic_reference'
 require 'concurrent/concern/logging'
+require 'concurrent/concern/deprecation'
 require 'concurrent/executor/immediate_executor'
 require 'concurrent/executor/cached_thread_pool'
-require 'concurrent/utility/at_exit'
 require 'concurrent/utility/processor_counter'
 
 module Concurrent
   extend Concern::Logging
+  extend Concern::Deprecation
 
   autoload :Options, 'concurrent/options'
   autoload :TimerSet, 'concurrent/executor/timer_set'
@@ -97,15 +98,15 @@ module Concurrent
   end
 
   # @!visibility private
-  GLOBAL_FAST_EXECUTOR = Delay.new { Concurrent.new_fast_executor(auto_terminate: true) }
+  GLOBAL_FAST_EXECUTOR = Delay.new { Concurrent.new_fast_executor }
   private_constant :GLOBAL_FAST_EXECUTOR
 
   # @!visibility private
-  GLOBAL_IO_EXECUTOR = Delay.new { Concurrent.new_io_executor(auto_terminate: true) }
+  GLOBAL_IO_EXECUTOR = Delay.new { Concurrent.new_io_executor }
   private_constant :GLOBAL_IO_EXECUTOR
 
   # @!visibility private
-  GLOBAL_TIMER_SET = Delay.new { TimerSet.new(auto_terminate: true) }
+  GLOBAL_TIMER_SET = Delay.new { TimerSet.new }
   private_constant :GLOBAL_TIMER_SET
 
   # @!visibility private
@@ -115,7 +116,7 @@ module Concurrent
   # Disables AtExit handlers including pool auto-termination handlers.
   # When disabled it will be the application programmer's responsibility
   # to ensure that the handlers are shutdown properly prior to application
-  # exit by calling {AtExit.run} method.
+  # exit by calling `AtExit.run` method.
   #
   # @note this option should be needed only because of `at_exit` ordering
   #   issues which may arise when running some of the testing frameworks.
@@ -125,9 +126,10 @@ module Concurrent
   # @note This method should *never* be called
   #   from within a gem. It should *only* be used from within the main
   #   application and even then it should be used only when necessary.
-  # @see AtExit
+  # @deprecated Has no effect since it is no longer needed, see https://github.com/ruby-concurrency/concurrent-ruby/pull/841.
+  #
   def self.disable_at_exit_handlers!
-    AtExit.enabled = false
+    deprecated "Method #disable_at_exit_handlers! has no effect since it is no longer needed, see https://github.com/ruby-concurrency/concurrent-ruby/pull/841."
   end
 
   # Global thread pool optimized for short, fast *operations*.
@@ -171,14 +173,16 @@ module Concurrent
         auto_terminate:  opts.fetch(:auto_terminate, true),
         idletime:        60, # 1 minute
         max_queue:       0, # unlimited
-        fallback_policy: :abort # shouldn't matter -- 0 max queue
+        fallback_policy: :abort, # shouldn't matter -- 0 max queue
+        name:            "fast"
     )
   end
 
   def self.new_io_executor(opts = {})
     CachedThreadPool.new(
         auto_terminate:  opts.fetch(:auto_terminate, true),
-        fallback_policy: :abort # shouldn't matter -- 0 max queue
+        fallback_policy: :abort, # shouldn't matter -- 0 max queue
+        name:            "io"
     )
   end
 end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/abstract_executor_service.rb

@@ -1,7 +1,7 @@
 require 'concurrent/errors'
+require 'concurrent/concern/deprecation'
 require 'concurrent/executor/executor_service'
 require 'concurrent/synchronization'
-require 'concurrent/utility/at_exit'
 
 module Concurrent
 
@@ -9,6 +9,7 @@ module Concurrent
   # @!visibility private
   class AbstractExecutorService < Synchronization::LockableObject
     include ExecutorService
+    include Concern::Deprecation
 
     # The set of possible fallback policies that may be set at thread pool creation.
     FALLBACK_POLICIES = [:abort, :discard, :caller_runs].freeze
@@ -16,10 +17,20 @@ module Concurrent
     # @!macro executor_service_attr_reader_fallback_policy
     attr_reader :fallback_policy
 
+    attr_reader :name
+
     # Create a new thread pool.
-    def initialize(*args, &block)
+    def initialize(opts = {}, &block)
       super(&nil)
-      synchronize { ns_initialize(*args, &block) }
+      synchronize do
+        @auto_terminate = opts.fetch(:auto_terminate, true)
+        @name = opts.fetch(:name) if opts.key?(:name)
+        ns_initialize(opts, &block)
+      end
+    end
+
+    def to_s
+      name ? "#{super[0..-2]} name: #{name}>" : super
     end
 
     # @!macro executor_service_method_shutdown
@@ -54,12 +65,12 @@ module Concurrent
 
     # @!macro executor_service_method_auto_terminate_question
     def auto_terminate?
-      synchronize { ns_auto_terminate? }
+      synchronize { @auto_terminate }
     end
 
     # @!macro executor_service_method_auto_terminate_setter
     def auto_terminate=(value)
-      synchronize { self.ns_auto_terminate = value }
+      deprecated "Method #auto_terminate= has no effect. Set :auto_terminate option when executor is initialized."
     end
 
     private
@@ -110,25 +121,8 @@ module Concurrent
     end
 
     def ns_auto_terminate?
-      !!@auto_terminate
+      @auto_terminate
     end
 
-    def ns_auto_terminate=(value)
-      case value
-      when true
-        AtExit.add(self) { terminate_at_exit }
-        @auto_terminate = true
-      when false
-        AtExit.delete(self)
-        @auto_terminate = false
-      else
-        raise ArgumentError
-      end
-    end
-
-    def terminate_at_exit
-      kill # TODO be gentle first
-      wait_for_termination(10)
-    end
   end
 end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/cached_thread_pool.rb

@@ -52,10 +52,10 @@ module Concurrent
       super(opts)
       if Concurrent.on_jruby?
         @max_queue          = 0
-        @executor = java.util.concurrent.Executors.newCachedThreadPool
+        @executor           = java.util.concurrent.Executors.newCachedThreadPool(
+            DaemonThreadFactory.new(ns_auto_terminate?))
         @executor.setRejectedExecutionHandler(FALLBACK_POLICY_CLASSES[@fallback_policy].new)
         @executor.setKeepAliveTime(opts.fetch(:idletime, DEFAULT_THREAD_IDLETIMEOUT), java.util.concurrent.TimeUnit::SECONDS)
-        self.auto_terminate = opts.fetch(:auto_terminate, true)
       end
     end
   end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/executor_service.rb

@@ -111,10 +111,10 @@ module Concurrent
 
   # @!macro executor_service_method_auto_terminate_setter
   #
+  #
   #   Set the auto-terminate behavior for this executor.
-  #
+  #   @deprecated Has no effect
   #   @param [Boolean] value The new auto-terminate value to set for this executor.
-  #
   #   @return [Boolean] `true` when auto-termination is enabled else `false`.
 
   ###################################################################

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/fixed_thread_pool.rb

@@ -115,12 +115,13 @@ module Concurrent
   #   Thread pools support several configuration options:
   #
   #   * `idletime`: The number of seconds that a thread may be idle before being reclaimed.
+  #   * `name`: The name of the executor (optional). Printed in the executor's `#to_s` output and
+  #     a `<name>-worker-<id>` name is given to its threads if supported by used Ruby
+  #     implementation. `<id>` is uniq for each thread.
   #   * `max_queue`: The maximum number of tasks that may be waiting in the work queue at
   #     any one time. When the queue size reaches `max_queue` and no new threads can be created,
   #     subsequent tasks will be rejected in accordance with the configured `fallback_policy`.
-  #   * `auto_terminate`: When true (default) an `at_exit` handler will be registered which
-  #     will stop the thread pool when the application exits. See below for more information
-  #     on shutting down thread pools.
+  #   * `auto_terminate`: When true (default), the threads started will be marked as daemon.
   #   * `fallback_policy`: The policy defining how rejected tasks are handled.
   #
   #   Three fallback policies are supported:
@@ -145,16 +146,12 @@ module Concurrent
   #
   #   On some runtime platforms (most notably the JVM) the application will not
   #   exit until all thread pools have been shutdown. To prevent applications from
-  #   "hanging" on exit all thread pools include an `at_exit` handler that will
-  #   stop the thread pool when the application exits. This handler uses a brute
-  #   force method to stop the pool and makes no guarantees regarding resources being
-  #   used by any tasks still running. Registration of this `at_exit` handler can be
-  #   prevented by setting the thread pool's constructor `:auto_terminate` option to
-  #   `false` when the thread pool is created. All thread pools support this option.
+  #   "hanging" on exit, all threads can be marked as daemon according to the
+  #   `:auto_terminate` option.
   #
   #   ```ruby
-  #   pool1 = Concurrent::FixedThreadPool.new(5) # an `at_exit` handler will be registered
-  #   pool2 = Concurrent::FixedThreadPool.new(5, auto_terminate: false) # prevent `at_exit` handler registration
+  #   pool1 = Concurrent::FixedThreadPool.new(5) # threads will be marked as daemon
+  #   pool2 = Concurrent::FixedThreadPool.new(5, auto_terminate: false) # mark threads as non-daemon
   #   ```
   #
   #   @note Failure to properly shutdown a thread pool can lead to unpredictable results.
@@ -163,7 +160,7 @@ module Concurrent
   #   @see http://docs.oracle.com/javase/tutorial/essential/concurrency/pools.html Java Tutorials: Thread Pools
   #   @see http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Executors.html Java Executors class
   #   @see http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html Java ExecutorService interface
-  #   @see http://ruby-doc.org//core-2.2.0/Kernel.html#method-i-at_exit Kernel#at_exit
+  #   @see https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html#setDaemon-boolean-
 
 
 

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/java_executor_service.rb

@@ -18,10 +18,6 @@ if Concurrent.on_jruby?
       }.freeze
       private_constant :FALLBACK_POLICY_CLASSES
 
-      def initialize(*args, &block)
-        super
-      end
-
       def post(*args, &task)
         raise ArgumentError.new('no block given') unless block_given?
         return handle_fallback(*args, &task) unless running?
@@ -42,7 +38,6 @@ if Concurrent.on_jruby?
 
       def shutdown
         synchronize do
-          self.ns_auto_terminate = false
           @executor.shutdown
           nil
         end
@@ -50,7 +45,6 @@ if Concurrent.on_jruby?
 
       def kill
         synchronize do
-          self.ns_auto_terminate = false
           @executor.shutdownNow
           nil
         end
@@ -87,5 +81,23 @@ if Concurrent.on_jruby?
       end
       private_constant :Job
     end
+
+    class DaemonThreadFactory
+      # hide include from YARD
+      send :include, java.util.concurrent.ThreadFactory
+
+      def initialize(daemonize = true)
+        @daemonize = daemonize
+      end
+
+      def newThread(runnable)
+        thread = java.util.concurrent.Executors.defaultThreadFactory().newThread(runnable)
+        thread.setDaemon(@daemonize)
+        return thread
+      end
+    end
+
+    private_constant :DaemonThreadFactory
+
   end
 end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/java_single_thread_executor.rb

@@ -19,10 +19,11 @@ if Concurrent.on_jruby?
       private
 
       def ns_initialize(opts)
-        @executor = java.util.concurrent.Executors.newSingleThreadExecutor
+        @executor = java.util.concurrent.Executors.newSingleThreadExecutor(
+            DaemonThreadFactory.new(ns_auto_terminate?)
+        )
         @fallback_policy = opts.fetch(:fallback_policy, :discard)
         raise ArgumentError.new("#{@fallback_policy} is not a valid fallback policy") unless FALLBACK_POLICY_CLASSES.keys.include?(@fallback_policy)
-        self.auto_terminate = opts.fetch(:auto_terminate, true)
       end
     end
   end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/java_thread_pool_executor.rb

@@ -114,10 +114,11 @@ if Concurrent.on_jruby?
             idletime,
             java.util.concurrent.TimeUnit::SECONDS,
             queue,
+            DaemonThreadFactory.new(ns_auto_terminate?),
             FALLBACK_POLICY_CLASSES[@fallback_policy].new)
 
-        self.auto_terminate = opts.fetch(:auto_terminate, true)
       end
     end
+
   end
 end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_executor_service.rb

@@ -27,7 +27,6 @@ module Concurrent
     def shutdown
       synchronize do
         break unless running?
-        self.ns_auto_terminate = false
         stop_event.set
         ns_shutdown_execution
       end
@@ -37,7 +36,6 @@ module Concurrent
     def kill
       synchronize do
         break if shutdown?
-        self.ns_auto_terminate = false
         stop_event.set
         ns_kill_execution
         stopped_event.set

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_single_thread_executor.rb

@@ -15,7 +15,6 @@ module Concurrent
         max_queue: 0,
         idletime: DEFAULT_THREAD_IDLETIMEOUT,
         fallback_policy: opts.fetch(:fallback_policy, :discard),
-        auto_terminate: opts.fetch(:auto_terminate, true)
       )
     end
   end

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb

@@ -122,8 +122,6 @@ module Concurrent
       raise ArgumentError.new("`min_threads` cannot be less than #{DEFAULT_MIN_POOL_SIZE}") if @min_length < DEFAULT_MIN_POOL_SIZE
       raise ArgumentError.new("`min_threads` cannot be more than `max_threads`") if min_length > max_length
 
-      self.auto_terminate = opts.fetch(:auto_terminate, true)
-
       @pool                 = [] # all workers
       @ready                = [] # used as a stash (most idle worker is at the start)
       @queue                = [] # used as queue
@@ -131,6 +129,7 @@ module Concurrent
       @scheduled_task_count = 0
       @completed_task_count = 0
       @largest_length       = 0
+      @workers_counter      = 0
       @ruby_pid             = $$ # detects if Ruby has forked
 
       @gc_interval  = opts.fetch(:gc_interval, @idletime / 2.0).to_i # undocumented
@@ -224,7 +223,8 @@ module Concurrent
     def ns_add_busy_worker
       return if @pool.size >= @max_length
 
-      @pool << (worker = Worker.new(self))
+      @workers_counter += 1
+      @pool << (worker = Worker.new(self, @workers_counter))
       @largest_length = @pool.length if @pool.length > @largest_length
       worker
     end
@@ -284,6 +284,7 @@ module Concurrent
         @scheduled_task_count = 0
         @completed_task_count = 0
         @largest_length       = 0
+        @workers_counter      = 0
         @ruby_pid             = $$
       end
     end
@@ -292,11 +293,15 @@ module Concurrent
     class Worker
       include Concern::Logging
 
-      def initialize(pool)
+      def initialize(pool, id)
         # instance variables accessed only under pool's lock so no need to sync here again
         @queue  = Queue.new
         @pool   = pool
         @thread = create_worker @queue, pool, pool.idletime
+
+        if @thread.respond_to?(:name=)
+          @thread.name = [pool.name, 'worker', id].compact.join('-')
+        end
       end
 
       def <<(message)

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/simple_executor_service.rb

@@ -91,7 +91,7 @@ module Concurrent
 
     private
 
-    def ns_initialize
+    def ns_initialize(*args)
       @running = Concurrent::AtomicBoolean.new(true)
       @stopped = Concurrent::Event.new
       @count = Concurrent::AtomicFixnum.new(0)

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/single_thread_executor.rb

@@ -1,3 +1,4 @@
+require 'concurrent/utility/engine'
 require 'concurrent/executor/ruby_single_thread_executor'
 
 module Concurrent

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/timer_set.rb

@@ -77,7 +77,6 @@ module Concurrent
       @timer_executor     = SingleThreadExecutor.new
       @condition          = Event.new
       @ruby_pid           = $$ # detects if Ruby has forked
-      self.auto_terminate = opts.fetch(:auto_terminate, true)
     end
 
     # Post the task to the internal queue.

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/immutable_struct.rb

@@ -70,6 +70,14 @@ module Concurrent
       ns_select(&block)
     end
 
+    private
+
+    # @!visibility private
+    def initialize_copy(original)
+      super(original)
+      ns_initialize_copy
+    end
+
     # @!macro struct_new
     def self.new(*args, &block)
       clazz_name = nil

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/map.rb

@@ -197,7 +197,7 @@ module Concurrent
     # Insert value into map with key if key is absent in one atomic step.
     # @param [Object] key
     # @param [Object] value
-    # @return [Object, nil] the value or nil when key was present
+    # @return [Object, nil] the previous value when key was present or nil when there was no key
     def put_if_absent(key, value)
       computed = false
       result   = compute_if_absent(key) do

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/mutable_struct.rb

@@ -196,6 +196,16 @@ module Concurrent
       raise NameError.new("no member '#{member}' in struct")
     end
 
+    private
+
+    # @!visibility private
+    def initialize_copy(original)
+      synchronize do
+        super(original)
+        ns_initialize_copy
+      end
+    end
+
     # @!macro struct_new
     def self.new(*args, &block)
       clazz_name = nil

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/settable_struct.rb

@@ -91,6 +91,16 @@ module Concurrent
       raise NameError.new("no member '#{member}' in struct")
     end
 
+    private
+
+    # @!visibility private
+    def initialize_copy(original)
+      synchronize do
+        super(original)
+        ns_initialize_copy
+      end
+    end
+
     # @!macro struct_new
     def self.new(*args, &block)
       clazz_name = nil

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/synchronization/abstract_struct.rb

@@ -115,6 +115,17 @@ module Concurrent
         self.class.new(*self.to_h.merge(other, &block).values)
       end
 
+      # @!visibility private
+      def ns_initialize_copy
+        @values = @values.map do |val|
+          begin
+            val.clone
+          rescue TypeError
+            val
+          end
+        end
+      end
+
       # @!visibility private
       def pr_underscore(clazz)
         word = clazz.to_s.dup # dup string to workaround JRuby 9.2.0.0 bug https://github.com/jruby/jruby/issues/5229