[ruby/resolv] _1 is not provided in Ruby 2.5
https://github.com/ruby/resolv/commit/83f18e2a49
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@ -89,8 +89,8 @@ class TestResolvDNS < Test::Unit::TestCase
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# If we get to this point, we have a valid t & u socket
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yield us.last, ts.last
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ensure
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ts.each { _1.close }
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us.each { _1.close }
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ts.each(&:close)
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us.each(&:close)
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end
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else
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# Explicitly specified port, don't retry the bind.
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