【bug】ThisType is invalid when using param on generic object

Bug Report

🔎 Search Terms

ThisType Object Generic

🕗 Version & Regression Information

I was unable to test this on prior versions because I was not using this feature previously

⏯ Playground Link

Playground link with relevant code

💻 Code

type ILifetime = {
  onShareTimeline: () => string
}

function createObject<D>(obj: D & ILifetime & ThisType<D>) {
  console.warn(obj)
}

// working
createObject({
  title: 'demo',
  onShareTimeline() {
    return ''
  }
})

// not working
createObject({
  title: 'demo',
  onShareTimeline() {
    return this.title
  }
})

🙁 Actual behavior

The generic type is broken

🙂 Expected behavior

The generic type should contain the object properties as those are finally included into the result

Comienza con el TypeScript Playground enlazado y el ejemplo genérico createObject, comparando el callback que funciona con la versión que lee this.title. Investiga cómo se aplica ThisType durante el tipado contextual de objetos genéricos; se considera terminado cuando el tipo de objeto inferido incluye title y el callback puede devolver this.title sin errores.