break-ruby-atomic.rb

#!/usr/bin/env ruby

require 'atomic'

atomic1 = Atomic.new([ -1, 0 ])
atomic2 = Atomic.new(0)

array = []

1000.times do |idx|
  atomic1.update do |old_values|
    array << old_values.inspect
  
    new_values = Array.new(2)
    new_values[0] = old_values[0] + rand
    new_values[1] = old_values[1] + rand
    
    new_values
  end
  
  atomic2.update { |v| v + 1 }
  
  if idx % 100 == 0
    GC.start
  end
end

output.md

OS X

$ ruby break-ruby-atomic.rb 
break-ruby-atomic.rb:12: [BUG] Segmentation fault
ruby 1.8.7 (2010-01-10 patchlevel 249) [universal-darwin11.0]

Abort

Linux

$ ruby break-ruby-atomic.rb 
break-ruby-atomic.rb:12: [BUG] Segmentation fault
ruby 1.8.7 (2011-02-18 patchlevel 334) [x86_64-linux], MBARI 0x6770, Ruby Enterprise Edition 2011.03

GitHub Issue: headius/ruby-atomic#11

Fix: headius/ruby-atomic#12