[Ruby 1.9 - Bug #408] (Open) Array#[]= 要素数が減るとき

e$B%A%1%C%He(B #408 e$B$,99?7$5$l$^$7$?!#e(B (by Shyouhei U.)

e$B%9%F!<%?%9e(B Closede$B$+$ie(BOpene$B$KJQ99e(B

e$B2>$K$=$&$J$ie(B[-2,2]=nile$B$Ge(Bnile$B$,e(Be$B$R$H$D$@$1e(Be$B;D$k0UL#$,J,$+$j$^$;$s!#e(B
e$B$3$N5sF0$O$d$O$j%P%0$G$"$k$H;W$$$^$9!#e(B

http://redmine.ruby-lang.org/issues/show/408