Fixed double printing of exceptions when enabeling the debugger....

src/d8.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 687 matching lines @@
           if (response.body[i].type == Debug.ScriptType.Native) {
             result += ', native';
           } else if (response.body[i].type == Debug.ScriptType.Extension) {
             result += ', extension';
           }
           result += ')';
         }
         details.text = result;
         break;
 
+      case 'continue':
+        details.text = "(running)";
+        break;
+        
       default:
         details.text =
-            'Response for unknown command \'' + response.command + '\'';
+            'Response for unknown command \'' + response.command + '\'' +
+            ' (' + json_response + ')';
     }
   } catch (e) {
     details.text = 'Error: "' + e + '" formatting response';
   }
   
   return details;
 };
 
 
 function MakeJSONPair_(name, value) {
@@ skipping 193 matching lines @@
       json += NumberToJSON_(elem);
     } else if (typeof(elem) === 'string')  {
       json += StringToJSON_(elem);
     } else {
       json += elem;
     }
   }
   json += ']';
   return json;
 }