bindings: Add empty checks for toV8()

Source/bindings/tests/results/core/V8TestObject.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #include "V8TestObject.h"
 
 #include "bindings/core/v8/BindingSecurity.h"
@@ skipping 12974 matching lines @@
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> *argv = 0;
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "voidMethodImplementedInPrivateScript", holder, 0, argv);
     if (v8Value.IsEmpty())
         return false;
     RELEASE_ASSERT(!exceptionState.hadException());
     return true;
 }
 
 bool V8TestObject::PrivateScript::shortMethodImplementedInPrivateScriptMethod(LocalFrame* frame, TestObject* holderImpl, int* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> *argv = 0;
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "shortMethodImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "shortMethodImplementedInPrivateScript", holder, 0, argv);
     if (v8Value.IsEmpty())
         return false;
     int cppValue = toInt16(scriptState->isolate(), v8Value, NormalConversion, exceptionState);
     if (exceptionState.throwIfNeeded())
         return false;
     *result = cppValue;
@@ skipping 10 matching lines @@
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> valueHandle = v8::Integer::New(scriptState->isolate(), value);
     v8::Local<v8::Value> argv[] = { valueHandle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "shortMethodWithShortArgumentImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "shortMethodWithShortArgumentImplementedInPrivateScript", holder, 1, argv);
     if (v8Value.IsEmpty())
         return false;
     int cppValue = toInt16(scriptState->isolate(), v8Value, NormalConversion, exceptionState);
     if (exceptionState.throwIfNeeded())
         return false;
@@ skipping 11 matching lines @@
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> valueHandle = v8String(scriptState->isolate(), value);
     v8::Local<v8::Value> argv[] = { valueHandle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "stringMethodWithStringArgumentImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "stringMethodWithStringArgumentImplementedInPrivateScript", holder, 1, argv);
     if (v8Value.IsEmpty())
         return false;
     V8StringResource<> cppValue = v8Value;
     if (!cppValue.prepare())
         return false;
@@ skipping 11 matching lines @@
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> valueHandle = toV8(value, scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> argv[] = { valueHandle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "nodeMethodWithNodeArgumentImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "nodeMethodWithNodeArgumentImplementedInPrivateScript", holder, 1, argv);
     if (v8Value.IsEmpty())
         return false;
     Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
     *result = cppValue;
     RELEASE_ASSERT(!exceptionState.hadException());
     return true;
 }
 
 bool V8TestObject::PrivateScript::nodeMethodWithVariousArgumentsImplementedInPrivateScriptMethod(LocalFrame* frame, TestObject* holderImpl, PassRefPtrWillBeRawPtr<Document> document, PassRefPtrWillBeRawPtr<Node> node, int value1, double value2, String string, RefPtrWillBeRawPtr<Node>* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> documentHandle = toV8(document, scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> nodeHandle = toV8(node, scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> value1Handle = v8::Integer::New(scriptState->isolate(), value1);
     v8::Local<v8::Value> value2Handle = v8::Number::New(scriptState->isolate(), value2);
     v8::Local<v8::Value> stringHandle = v8String(scriptState->isolate(), string);
     v8::Local<v8::Value> argv[] = { documentHandle, nodeHandle, value1Handle, value2Handle, stringHandle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "nodeMethodWithVariousArgumentsImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "nodeMethodWithVariousArgumentsImplementedInPrivateScript", holder, 5, argv);
     if (v8Value.IsEmpty())
@@ skipping 13 matching lines @@
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     v8::Local<v8::Value> value1Handle = v8::Integer::New(scriptState->isolate(), value1);
     v8::Local<v8::Value> value2Handle = v8::Integer::New(scriptState->isolate(), value2);
     v8::Local<v8::Value> argv[] = { value1Handle, value2Handle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "methodForPrivateScriptOnly", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "methodForPrivateScriptOnly", holder, 2, argv);
     if (v8Value.IsEmpty())
         return false;
     int cppValue = toInt16(scriptState->isolate(), v8Value, NormalConversion, exceptionState);
     if (exceptionState.throwIfNeeded())
@@ skipping 12 matching lines @@
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "readonlyShortAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "readonlyShortAttribute", holder);
     if (v8Value.IsEmpty())
         return false;
     int cppValue = toInt16(scriptState->isolate(), v8Value, NormalConversion, exceptionState);
     if (exceptionState.throwIfNeeded())
         return false;
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::shortAttributeAttributeGetter(LocalFrame* frame, TestObject* holderImpl, int* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "shortAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "shortAttribute", holder);
     if (v8Value.IsEmpty())
         return false;
     int cppValue = toInt16(scriptState->isolate(), v8Value, NormalConversion, exceptionState);
     if (exceptionState.throwIfNeeded())
         return false;
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::shortAttributeAttributeSetter(LocalFrame* frame, TestObject* holderImpl, int cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::SetterContext, "shortAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "TestObject", "shortAttribute", holder, v8::Integer::New(scriptState->isolate(), cppValue));
 }
 
 bool V8TestObject::PrivateScript::stringAttributeAttributeGetter(LocalFrame* frame, TestObject* holderImpl, String* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "stringAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "stringAttribute", holder);
     if (v8Value.IsEmpty())
         return false;
     V8StringResource<> cppValue = v8Value;
     if (!cppValue.prepare())
         return false;
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::stringAttributeAttributeSetter(LocalFrame* frame, TestObject* holderImpl, String cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::SetterContext, "stringAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "TestObject", "stringAttribute", holder, v8String(scriptState->isolate(), cppValue));
 }
 
 bool V8TestObject::PrivateScript::nodeAttributeAttributeGetter(LocalFrame* frame, TestObject* holderImpl, RefPtrWillBeRawPtr<Node>* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "nodeAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "nodeAttribute", holder);
     if (v8Value.IsEmpty())
         return false;
     Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::nodeAttributeAttributeSetter(LocalFrame* frame, TestObject* holderImpl, PassRefPtrWillBeRawPtr<Node> cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::SetterContext, "nodeAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "TestObject", "nodeAttribute", holder, toV8(cppValue, scriptState->context()->Global(), scriptState->isolate()));
 }
 
 bool V8TestObject::PrivateScript::attributeForPrivateScriptOnlyAttributeGetter(LocalFrame* frame, TestObject* holderImpl, String* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "attributeForPrivateScriptOnly", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "attributeForPrivateScriptOnly", holder);
     if (v8Value.IsEmpty())
         return false;
     V8StringResource<> cppValue = v8Value;
     if (!cppValue.prepare())
         return false;
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::attributeForPrivateScriptOnlyAttributeSetter(LocalFrame* frame, TestObject* holderImpl, String cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::SetterContext, "attributeForPrivateScriptOnly", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "TestObject", "attributeForPrivateScriptOnly", holder, v8String(scriptState->isolate(), cppValue));
 }
 
 bool V8TestObject::PrivateScript::enumForPrivateScriptAttributeGetter(LocalFrame* frame, TestObject* holderImpl, String* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "enumForPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Local<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "enumForPrivateScript", holder);
     if (v8Value.IsEmpty())
         return false;
     V8StringResource<> cppValue = v8Value;
     if (!cppValue.prepare())
         return false;
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::enumForPrivateScriptAttributeSetter(LocalFrame* frame, TestObject* holderImpl, String cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
     ScriptForbiddenScope::AllowUserAgentScript script;
     v8::Local<v8::Context> contextInPrivateScript = toV8Context(frame, DOMWrapperWorld::privateScriptIsolatedWorld());
     if (contextInPrivateScript.IsEmpty())
         return false;
     ScriptState* scriptState = ScriptState::from(contextInPrivateScript);
     ScriptState* scriptStateInUserScript = ScriptState::forMainWorld(frame);
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
+    if (holder.IsEmpty())
+        return false;
 
     ExceptionState exceptionState(ExceptionState::SetterContext, "enumForPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "TestObject", "enumForPrivateScript", holder, v8String(scriptState->isolate(), cppValue));
 }
 
 } // namespace blink