src: handle empty Maybe(Local) in node_util.cc

PR-URL: #33867
Refs: https://github.com/nodejs/node/blob/master/src/README.md#checked-conversion
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/node_util.cc

@@ -148,11 +148,11 @@ static void GetHiddenValue(const FunctionCallbackInfo<Value>& args) {
   CHECK(args[1]->IsUint32());
 
   Local<Object> obj = args[0].As<Object>();
-  auto index = args[1]->Uint32Value(env->context()).FromJust();
-  auto private_symbol = IndexToPrivateSymbol(env, index);
-  auto maybe_value = obj->GetPrivate(env->context(), private_symbol);
-
-  args.GetReturnValue().Set(maybe_value.ToLocalChecked());
+  uint32_t index = args[1].As<Uint32>()->Value();
+  Local<Private> private_symbol = IndexToPrivateSymbol(env, index);
+  Local<Value> ret;
+  if (obj->GetPrivate(env->context(), private_symbol).ToLocal(&ret))
+    args.GetReturnValue().Set(ret);
 }
 
 static void SetHiddenValue(const FunctionCallbackInfo<Value>& args) {
@@ -162,11 +162,11 @@ static void SetHiddenValue(const FunctionCallbackInfo<Value>& args) {
   CHECK(args[1]->IsUint32());
 
   Local<Object> obj = args[0].As<Object>();
-  auto index = args[1]->Uint32Value(env->context()).FromJust();
-  auto private_symbol = IndexToPrivateSymbol(env, index);
-  auto maybe_value = obj->SetPrivate(env->context(), private_symbol, args[2]);
-
-  args.GetReturnValue().Set(maybe_value.FromJust());
+  uint32_t index = args[1].As<Uint32>()->Value();
+  Local<Private> private_symbol = IndexToPrivateSymbol(env, index);
+  bool ret;
+  if (obj->SetPrivate(env->context(), private_symbol, args[2]).To(&ret))
+    args.GetReturnValue().Set(ret);
 }
 
 static void Sleep(const FunctionCallbackInfo<Value>& args) {