[Ruby 1.9 - Bug #356] test_flush(TestIONonblock): Errno::EBADF: Bad file descriptor

e$B%A%1%C%He(B #356 e$B$,99?7$5$l$^$7$?!#e(B (by Kazuhiro NISHIYAMA)

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http://redmine.ruby-lang.org/issues/show/356