[Bug #1720](Assigned) [NaN] == [NaN] $B$,(B true $B$K$J$k(B

[Yuki_S]

e$B%A%1%C%He(B #1720 e$B$,99?7$5$l$^$7$?!#e(B (by Yuki S.)

e$B%9%F!<%?%9e(B Opene$B$+$ie(BAssignede$B$KJQ99e(B
e$BC4Ev<Te(B Yukihiro M.e$B$K%;%C%He(B
e$BM%@hEYe(B Normale$B$+$ie(BLowe$B$KJQ99e(B

e$B;d$be(B(4)e$B$r?d$7$^$9!#e(B

NaNe$B$,@8$8$k%1!<%9$C$F!“MW$ONc30$rH/@8$9$Y$-$H$3$mEAE}E*$J%b%G%k$rB:=E$7$F$3$&$J$C$F$$$k!”$HM}2r$7$F$$$^$9$+$i!#L5M}$K@09g@-$r;}$?$;$h$&$H$7$F$bFq$7$$$s$8$c$J$$$+$J!<$H!#$@$H$9$k$H0lHVHo32$,>/$J$$$N$,e(B(4)e$B$@$H;W$$$^$9!#e(B

http://redmine.ruby-lang.org/issues/show/1720