Can't access exception properties shown in Locals

I've came across this strange situation: I catch an exception to write its details to a log entry, but in the log entry I can see undefined instead of the attribute values expected and shown in the Locals window.

The portion of the code:

try {
    fso.CreateTextFile(fullname);
    return path;
  } catch (x) { // Something went wrong
    // Because exception forwarding between modules is not reliable in TC,
    // and this method is usually called from other modules, let's create 
    // a log entry and an error code instead.
    Log.Error("File creation error", 
      "Could not create [" + fullname + "] because of an error named [" + x.Name + "]\r\n\r\nDetails: " + x.Message, 
      pmNormal);
    return "";
  }

If you take a look at Locals.png, you'll see the exception object's attributes contain legitime values. However the log shows what you can see in Log.png. What am I missing?