This fixes bug with trying to get properties of non-object (symbol).

Source/core/inspector/InjectedScriptSource.js

Index: Source/core/inspector/InjectedScriptSource.js
diff --git a/Source/core/inspector/InjectedScriptSource.js b/Source/core/inspector/InjectedScriptSource.js
index b60be3e95288e365eddde8188f7fb2b7acba3747..5c09e129498d56209e0399efec7b3b0953d256db 100644
--- a/Source/core/inspector/InjectedScriptSource.js
+++ b/Source/core/inspector/InjectedScriptSource.js
@@ -383,7 +383,7 @@ InjectedScript.prototype = {
         var object = this._objectForId(parsedObjectId);
         var objectGroupName = this._idToObjectGroupName[parsedObjectId.id];
 
-        if (!this._isDefined(object))
+        if (!this._isDefined(object) || typeof object !== "object")

[aandrey, 2014/06/04 15:39:08]

I think "console.dir(function(){})" will no longer work.
Could you please check it, and add a test for it?

Let's create isSymbol() function and check for it explicitly, and then cast to
/** @type {!Object} */

[Alexandra Mikhaylova, 2014/06/05 13:27:43]

Done.

             return false;
         var descriptors = this._propertyDescriptors(object, ownProperties, accessorPropertiesOnly);
 
@@ -415,7 +415,7 @@ InjectedScript.prototype = {
         var parsedObjectId = this._parseObjectId(objectId);
         var object = this._objectForId(parsedObjectId);
         var objectGroupName = this._idToObjectGroupName[parsedObjectId.id];
-        if (!this._isDefined(object))
+        if (!this._isDefined(object) || typeof object !== "object")
             return false;
         var descriptors = [];
         var internalProperties = InjectedScriptHost.getInternalProperties(object);
@@ -874,7 +874,7 @@ InjectedScript.prototype = {
 
     /**
      * @param {Object} objectId
-     * @return {Object}
+     * @return {Object|symbol}
      */
     _objectForId: function(objectId)
     {
@@ -883,7 +883,7 @@ InjectedScript.prototype = {
 
     /**
      * @param {string} objectId
-     * @return {Object}
+     * @return {Object|symbol}
      */
     findObjectById: function(objectId)
     {