Stop the progressbar when an error occurs trying to fetch a report.

assets/javascripts/reporting/controls.js

@@ -121,8 +121,10 @@ Reporting.Controls = {
   default_failure_callback: function (response) {
     if (response.status >= 400 && response.status < 500) {
       Reporting.flash(response.responseText);
+      Reporting.Progress.abort();
     } else {
       Reporting.flash("There was an error getting the results. The administrator has been informed.");
+      Reporting.Progress.abort();
     }
   }
 };

assets/javascripts/reporting/progressbar.js

@@ -3,14 +3,18 @@
 
 Reporting.Progress = {
 
+  abort: function () {
+    window.progressbar.stop();
+  },
+
   replace_with_bar: function (element) {
     var parent = element.up();
     var size = parseInt(element.getAttribute('data-query-size'), 10) || 500;
     element.remove();
-    var bar = Reporting.Progress.add_bar_to_parent(parent);
+    window.progressbar = Reporting.Progress.add_bar_to_parent(parent);
     // Speed determined through laborous experimentation!
-    bar.options.interval = (size * (Math.log(size))) / 100000;
-    bar.start();
+    window.progressbar.options.interval = (size * (Math.log(size))) / 100000;
+    window.progressbar.start();
   },
 
   add_bar_to_parent: function (parent) {