w_symbol          473 marshal.c          w_symbol(rb_str_intern(s), arg);
w_symbol          550 marshal.c          w_symbol(ID2SYM(id), arg->arg);
w_symbol          597 marshal.c      	w_symbol(ID2SYM(rb_intern("E")), arg->arg);
w_symbol          602 marshal.c          w_symbol(ID2SYM(rb_id_encoding()), arg->arg);
w_symbol          696 marshal.c      	w_symbol(obj, arg);
w_symbol          889 marshal.c      		    w_symbol(RARRAY_AREF(mem, i), arg);