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diff --git a/lib/dtas/compat_onenine.rb b/lib/dtas/compat_onenine.rb
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+# -*- encoding: binary -*-
+# :stopdoc:
+# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net>
+# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+
+# Make Ruby 1.9.3 look like Ruby 2.0.0 to us
+# This exists for Debian wheezy users using the stock Ruby 1.9.3 install.
+# We'll drop this interface when Debian wheezy (7.0) becomes unsupported.
+class String
+  def b
+    dup.force_encoding(Encoding::BINARY)
+  end
+end unless String.method_defined?(:b)
+
+def IO
+  def self.pipe
+    super.map! { |io| io.close_on_exec = true; io }
+  end
+end if RUBY_VERSION.to_f <= 1.9