Don't hide errors

samples/react/MusicStore/ReactApp/render-server.js

@@ -61,8 +61,10 @@ function render(requestUrl, callback) {
             }
         });
     }).catch(function(error) {
+        process.nextTick(() => { // Because otherwise you can't throw from inside a catch
             callback(error, null);
         });
+    });
 }
 
 render('/', (err, html) => {