Fix debugger's eval when close to stack overflow.

src/debug.cc

 // Copyright 2012 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 2808 matching lines @@
   ProcessDebugEvent(v8::AfterCompile,
                     Handle<JSObject>::cast(event_data),
                     true);
 }
 
 
 void Debugger::OnScriptCollected(int id) {
   HandleScope scope(isolate_);
 
   // No more to do if not debugging.
+  if (isolate_->debug()->InDebugger()) return;
   if (!IsDebuggerActive()) return;
   if (!Debugger::EventActive(v8::ScriptCollected)) return;
 
   // Enter the debugger.
   EnterDebugger debugger;
   if (debugger.FailedToEnter()) return;
 
   // Create the script collected state object.
   bool caught_exception = false;
   Handle<Object> event_data = MakeScriptCollectedEvent(id,
@@ skipping 927 matching lines @@
     {
       Locker locker;
       Isolate::Current()->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal