Don't NULL-check GlobalHandle::Node::object_

test/cctest/test-global-handles.cc

 // Copyright 2013 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 383 matching lines @@
   v8::Local<v8::Object> o = v8::Object::New(isolate);
   CHECK(!o.IsEmpty());
   v8::Persistent<v8::Object> p(isolate, o);
   CHECK(o == p.Get(isolate));
   CHECK(v8::Local<v8::Object>::New(isolate, p) == p.Get(isolate));
 
   v8::Global<v8::Object> g(isolate, o);
   CHECK(o == g.Get(isolate));
   CHECK(v8::Local<v8::Object>::New(isolate, g) == g.Get(isolate));
 }
+
+
+void WeakCallback(const v8::WeakCallbackInfo<void>& data) {}
+
+
+TEST(WeakPersistentSmi) {
+  CcTest::InitializeVM();
+  v8::Isolate* isolate = CcTest::isolate();
+
+  v8::HandleScope scope(isolate);
+  v8::Local<v8::Number> n = v8::Number::New(isolate, 0);
+  v8::Global<v8::Number> g(isolate, n);
+
+  // Should not crash.
+  g.SetWeak<void>(nullptr, &WeakCallback, v8::WeakCallbackType::kParameter);
+}