Catch parser exceptions (it does throw!)

lib/carto/renderer.js

@@ -35,9 +35,10 @@ carto.Renderer.prototype.render = function render(m, callback) {
             // allows frames and effects to be maintained.
             env = _(env).extend({filename:s.id});
 
-            // @TODO try/catch?
-            var time = +new Date(),
-                root = (carto.Parser(env)).parse(s.data);
+            var time = +new Date();
+            // Parser may throw
+            try { root = (carto.Parser(env)).parse(s.data); }
+            catch (err) { callback(err, null); return; }
             if (env.benchmark)
                 console.warn('Parsing time: ' + (new Date() - time) + 'ms');
             return root.toList(env);