Create result array of %DebugGetLoadedScripts outside the debug context.

src/runtime/runtime-debug.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/arguments.h"
 #include "src/compiler.h"
 #include "src/debug.h"
@@ skipping 2320 matching lines @@
       isolate, result, DebugEvaluate(isolate, outer_info, context,
                                      context_extension, receiver, source));
   return *result;
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugGetLoadedScripts) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
 
-  DebugScope debug_scope(isolate->debug());
-  // Fill the script objects.
-  Handle<FixedArray> instances = isolate->debug()->GetLoadedScripts();
+  Handle<FixedArray> instances;
+  {
+    DebugScope debug_scope(isolate->debug());
+    // Fill the script objects.
+    instances = isolate->debug()->GetLoadedScripts();
+  }
 
   // Convert the script objects to proper JS objects.
   for (int i = 0; i < instances->length(); i++) {
     Handle<Script> script = Handle<Script>(Script::cast(instances->get(i)));
     // Get the script wrapper in a local handle before calling GetScriptWrapper,
     // because using
     //   instances->set(i, *GetScriptWrapper(script))
     // is unsafe as GetScriptWrapper might call GC and the C++ compiler might
     // already have dereferenced the instances handle.
     Handle<JSObject> wrapper = Script::GetWrapper(script);
@@ skipping 451 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }
 }  // namespace v8::internal