Celluloid, exclusive, and blocks executed on receiver

Gemfile

source "https://rubygems.org"

gem "celluloid", github: "celluloid/celluloid", branch: "master"

Gemfile.lock

GIT
  remote: git://github.com/celluloid/celluloid.git
  revision: 9c28a6825cbdf4b916540caad82b17126c1f8945
  branch: master
  specs:
    celluloid (0.16.0)
      timers (~> 4.0.0)

GEM
  remote: https://rubygems.org/
  specs:
    hitimes (1.2.2)
    timers (4.0.1)
      hitimes

PLATFORMS
  ruby

DEPENDENCIES
  celluloid!

options.rb

require "bundler/setup"
require "celluloid"

Celluloid.logger = nil

class A
  include Celluloid

  def on_caller
    b = B.new
    b.on_caller {  }
  end

  def exclusive_on_caller
    b = B.new
    exclusive do
      b.on_caller {  }
    end
  end

  def on_receiver
    b = B.new
    b.on_receiver {  }
  end

  def exclusive_on_receiver
    b = B.new
    exclusive do
      b.on_receiver {  }
    end
  end
end

class B
  include Celluloid

  def on_caller(&block)
    yield
    puts "> B#on_caller #{block.inspect}"
  end

  def on_receiver(&block)
    yield
    puts "> B#on_receiver #{block.inspect}"
  end
  execute_block_on_receiver :on_receiver
end

A.new.on_caller
$stderr.puts "OK: #on_caller"

begin
  A.new.exclusive_on_caller
rescue => error
  $stderr.puts "OK: #exclusive_on_caller (#{error})"
end

A.new.on_receiver
$stderr.puts "OK: #on_receiver"

begin
  A.new.exclusive_on_receiver
rescue => error
  $stderr.puts "ERROR: #exclusive_on_receiver (#{error})"
else
  $stderr.puts "OK: #exclusive_on_receiver"
end

repro.rb

require "bundler/setup"
require "celluloid"

Celluloid.logger = nil

class A
  include Celluloid

  def exclusive_on_receiver
    b = B.new
    exclusive { b.on_receiver { $stderr.puts "OK" } }
  end
end

class B
  include Celluloid

  execute_block_on_receiver def on_receiver(&block)
    yield
  end
end

begin
  A.new.exclusive_on_receiver
rescue => error
  $stderr.puts "ERROR: #exclusive_on_receiver (#{error})"
end