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+Tue Dec  7 22:37:15 2010  Masaya Tarui  <tarui@ruby-lnag.org>
+
+	* io.c (io_read): duplicate string if shared. [ruby-dev:42719]
+
 Tue Dec  7 21:59:37 2010  Kouhei Sutou  <kou@cozmixng.org>
 
 	* lib/rexml/light/node.rb: remove circular require.