text: function pr(x) {
      return new Promise(resolve => {resolve(x)});
  }
  
  async function add(x) {
      const a = await pr(x);
  
      throw a + 1;
  
      const b = await pr(x + 10);
  
      return a + b;
  }
  
  add(50).then(v => {console.log(v - 1)}).catch(v => console.log(v));
  