options.end of fs.ReadStream does not work when options.start is undefined.

[MoonBall]

• Version: v8.9.4
• Platform: Darwin Kernel Version 16.7.0
• Subsystem: fs

code is

const { ReadStream } = require('fs');

stream = new ReadStream('./text.txt', {
  // start: 0,
  end: 2,
});

stream.on('data', data => {
  console.log('on data:', data.toString());
});
stream.on('end', () => {
  console.log('end');
});

./text.txt is：

abcde

When options.start is 0, the output is

on data: abc
end

When ignoring options.start, the output is

on data: abcde
end

If it is a bug, I can attempt to fix it.