Autoload hang

autoload e$B$r0J2<$N$h$&$K;H$&$H%O%s%0$7$^$9!#e(B

% cat foo.rb
class Foo
end
% ./ruby -ve ’
autoload “Foo”, “foo”
p Foo

ruby 1.9.1 (2008-12-11 revision 20633) [i686-linux]
e$B$3$3$G%O%s%0e(B

e$B$J$*!"e(Bruby -v e$B$N7k2L$@$He(B 1.9.1 branch
e$B$H6hJL$G$-$J$$$s$G$9$,!"e(B
trunk e$B$G$9!#e(B