Don't process debug requests if the debug event is script collected

src/debug.cc

 // Copyright 2006-2008 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 2016 matching lines @@
   // Notify the debugger that a debug event has occurred unless auto continue is
   // active in which case no event is send.
   if (sendEventMessage) {
     MessageImpl message = MessageImpl::NewEvent(
         event,
         auto_continue,
         Handle<JSObject>::cast(exec_state),
         Handle<JSObject>::cast(event_data));
     InvokeMessageHandler(message);
   }
-  if (auto_continue && !HasCommands()) {
+
+  // If auto continue don't make the event cause a break, but process messages
+  // in the queue if any. For script collected events don't even process
+  // messages in the queue as the execution state might not be what is expected
+  // by the client.
+  if (auto_continue && !HasCommands() || event == v8::ScriptCollected) {
     return;
   }
 
   // Get the DebugCommandProcessor.
   v8::Local<v8::Object> api_exec_state =
       v8::Utils::ToLocal(Handle<JSObject>::cast(exec_state));
   v8::Local<v8::String> fun_name =
       v8::String::New("debugCommandProcessor");
   v8::Local<v8::Function> fun =
       v8::Function::Cast(*api_exec_state->Get(fun_name));
@@ skipping 476 matching lines @@
 
 
 void LockingCommandMessageQueue::Clear() {
   ScopedLock sl(lock_);
   queue_.Clear();
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal