What does this log when you await an object that has a then method?

const thenable = {
  then(resolve) {
    console.log("then called");
    resolve(42);
  },
};
 
async function main() {
  console.log("before await");
  const value = await thenable;
  console.log("value:", value);
 
  const p = Promise.resolve(thenable);
  console.log(p === thenable, Promise.resolve(p) === p);
}
 
main();
console.log("end");