fix raygun error trying to clone Date

node_modules/ace/lib/ace/lib/lang.js

@@ -92,14 +92,12 @@ exports.deepCopy = function deepCopy(obj) {
         }
         return copy;
     }
-    var cons = obj.constructor;
-    if (cons === RegExp)
+    if (Object.prototype.toString.call(obj) !== "[object Object]")
         return obj;
     
-    copy = cons();
-    for (var key in obj) {
+    copy = {};
+    for (var key in obj)
         copy[key] = deepCopy(obj[key]);
-    }
     return copy;
 };
 

plugins/c9.fs/fs.cache.xml.js

@@ -629,6 +629,14 @@ define(function(require, exports, module) {
                     });
                 } else if (key === "children" || key === "isSelected") {
                     prop = null;
+                } else if (Object.prototype.toString.call(node[key]) == "[object Date]") {
+                    // why Date ends up here?
+                    reportError(new Error("Date in fs cache"), {
+                        key: key,
+                        value: node[key],
+                        path: node.path,
+                        hasParentProp: !!node.parent,
+                    });
                 } else {
                     prop = lang.deepCopy(node[key]);
                 }