Trying to tweak list evaluation.

document_parser.cpp

@@ -523,6 +523,7 @@ namespace Sass {
       else if (lex < return_directive >()) {
         Node ret_expr(context.new_Node(Node::return_directive, path, line, 1));
         ret_expr << parse_list();
+        ret_expr.should_eval() = true;
         block << ret_expr;
         semicolon = true;
       }

eval_apply.cpp

@@ -176,6 +176,7 @@ namespace Sass {
 
       case Node::comma_list:
       case Node::space_list: {
+        cerr << "evaluating list: " << expr.to_string() << endl;
         if (expr.should_eval()) expr[0] = eval(expr[0], prefix, env, f_env, new_Node, ctx);
         return expr;
       } break;