Bug #1791: r24205,r23960,r23892,r23871 e$B$r%P%C%/%]!<%H$9$ke(B
http://redmine.ruby-lang.org/issues/show/1791
e$B5/I<<Te(B: tadayoshi funaba
e$B%9%F!<%?%9e(B: Open, e$BM%@hEYe(B: High
e$BC4Ev<Te(B: Yuki S.
ruby -v: ruby 1.9.1p243 (2009-07-16 revision 24174) [i686-linux]
r24205,r23960,r23892,r23871 e$B$r%P%C%/%]!<%H$9$k!#e(B