Eval("a"): illegal multibyte char

e$B0J2<$N$h$&$Ke(B eval(“a”) e$B$H$9$k$He(B illegal multibyte char
e$B$J$ke(B
e$B%(%i!<$K$J$j$^$9!#e(B

% ./ruby -v -e ‘eval(“a”)’
ruby 1.9.0 (2007-12-02 patchlevel 0) [i686-linux]
-e:1:in eval': -e:1:ineval’: (eval):1: illegal multibyte char
(SyntaxError)
from -e:1:in `’