• Version: 12.16.2, 13.12.0
• Platform: linux
• Subsystem: arch

What steps will reproduce the bug?

If synchronous generator wrapped with stream.Readable.from emits rejected Promise then finally blocks of that generator is never called.
But if that generator is consumed with general for-of loop then finally blocks are called as expected.

stream.Readable.from(function*() {
  try {
    yield Promise.resolve(1)
    yield Promise.reject('error')
  } finally {
    console.log('fin')
  }
}())
.on('data',x=>console.log(x))
.on('error',e=>console.log(e))

It logs

but does not log fin.

How often does it reproduce? Is there a required condition?

Always.

What is the expected behavior?

stream.Readable.from should either not resolve Promises yielded from synchronous generators and should pass unresolved Promises to the returned stream or should properly close generator even if it yields rejected Promise.

Additional information

To fix this there should be called iterator.return if await value throws.