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def set(x)
Thread.current[:x] = x
end
def say
puts "#{Thread.current.object_id} #{Thread.current[:x].inspect}"
end
set 'ok'
say
Thread.new do
say
set 't1'
say
end.join
class ContextCopyingThread < Thread
def initialize
self[:x] = Thread.current[:x].dup
super
end
end
t2 = ContextCopyingThread.new do
say
set 't2'
say
end
puts 'waiting...'
t2.join
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