vm.call can‘t return value about sablejs HOT 5 CLOSED

const vLog = vm.createFunction('log', function() {
  const temp = [];
  for(let i = 0; i < arguments.length; i++){
    temp.push(vm.asString(arguments[i]));
  }
  console.log(...temp); // '1', 1, false
});

vm.call(
  vLog,  // function
  vm.createUndefined(), // this ptr
  vm.createString('1'),  // arguments[0]
  vm.createNumber(1),  // arguments[1]
  vm.createBoolean(false) // arguments[2]
);

// sign.js
function sign(data) {
  return data + ", do what you want";
}

// nodejs 16.15.1
const VM = require("sablejs/runtime")();
const fs = require("fs");

const vm = new VM();

// please run: sablejs -i fib.js -o output
vm.run(fs.readFileSync("./output").toString());
const vGlobal = vm.getGlobal();
const vSign = vm.getProperty(vGlobal, "sign");
const vRet = vm.call(vSign, vGlobal, vm.createString("Hello World"));
console.log(vm.asString(vRet)); // output: Hello World, do what you want

vm.destroy();