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require 'weakref'
# From MRI test_weakref.rb
class WeakRefSpec
def self.make_weakref(level = 10)
if level > 0
make_weakref(level - 1)
else
WeakRef.new(Object.new)
end
end
def self.make_dead_weakref
weaks = []
weak = nil
10_000.times do
weaks << make_weakref
GC.start
GC.start
break if weak = weaks.find { |w| !w.weakref_alive? }
end
weak
end
end
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