stream: readable.resume() not allowing 'end' to be emitted after readable.unshift() #25642

const { Readable } = require('stream');

const stream = new Readable({
  read(n) {}
});

process.nextTick(() => {
  stream.push(Buffer.alloc(1));
  stream.push(null);
});

(function checkFirstChunk() {
  var chunk = stream.read();
  if (!chunk)
    return stream.once('readable', checkFirstChunk);
  stream.unshift(chunk);
  stream.on('end', () => {
    console.log('file end');
  }).resume();
})();