brew vendor-gems: commit updates.

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

@@ -23,7 +23,7 @@ kernel = (class << ::Kernel; self; end)
     k.send(:private, :require) if private_require
   end
 end
-$:.unshift File.expand_path("#{__dir__}/../#{RUBY_ENGINE}/#{Gem.ruby_api_version}/gems/concurrent-ruby-1.2.1/lib/concurrent-ruby")
+$:.unshift File.expand_path("#{__dir__}/../#{RUBY_ENGINE}/#{Gem.ruby_api_version}/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby")
 $:.unshift File.expand_path("#{__dir__}/../#{RUBY_ENGINE}/#{Gem.ruby_api_version}/gems/i18n-1.12.0/lib")
 $:.unshift File.expand_path("#{__dir__}/../#{RUBY_ENGINE}/#{Gem.ruby_api_version}/gems/minitest-5.17.0/lib")
 $:.unshift File.expand_path("#{__dir__}/../#{RUBY_ENGINE}/#{Gem.ruby_api_version}/gems/tzinfo-2.0.6/lib")

Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/concurrent-ruby-1.2.2/lib/concurrent-ruby/concurrent/collection/map/non_concurrent_map_backend.rb

@@ -14,7 +14,7 @@ module Concurrent
       # reasons.
       def initialize(options = nil, &default_proc)
         validate_options_hash!(options) if options.kind_of?(::Hash)
-        @backend = Hash.new(&default_proc)
+        set_backend(default_proc)
         @default_proc = default_proc
       end
 
@@ -113,9 +113,17 @@ module Concurrent
 
       private
 
+      def set_backend(default_proc)
+        if default_proc
+          @backend = ::Hash.new { |_h, key| default_proc.call(self, key) }
+        else
+          @backend = {}
+        end
+      end
+
       def initialize_copy(other)
         super
-        @backend = Hash.new(&@default_proc)
+        set_backend(@default_proc)
         self
       end