Always goBack when using RefreshLocation

Author: mjackson

modules/utils/History.js

@@ -4,7 +4,7 @@ var canUseDOM = require('react/lib/ExecutionEnvironment').canUseDOM;
 var History = {
 
   /**
-   * Sends the browser back one entry in the history, if one is available.
+   * Sends the browser back one entry in the history.
    */
   back: function () {
     invariant(

modules/utils/createRouter.js

@@ -257,16 +257,23 @@ function createRouter(options) {
       },
 
       /**
-       * Transitions to the previous URL. Returns true if the router
-       * was able to go back, false otherwise.
+       * Transitions to the previous URL if one is available. Returns true if the
+       * router was able to go back, false otherwise.
+       *
+       * Note: The router only tracks history entries in your application, not the
+       * current browser session, so you can safely call this function without guarding
+       * against sending the user back to some other site. However, when using
+       * RefreshLocation (which is the fallback for HistoryLocation in browsers that
+       * don't support HTML5 history) this method will *always* send the client back
+       * because we cannot reliably track history length.
        */
       goBack: function () {
         invariant(
           typeof location !== 'string',
           'You cannot use goBack with a static location'
         );
 
-        if (History.length > 1) {
+        if (History.length > 1 || location === RefreshLocation) {
           location.pop();
           return true;
         }