Issues with the new "readline" support for QuestionHelper

[javiereguiluz]

Symfony added "readline" support for console in #15382. The feature works OK when using the arrow keys, but it suffers some issues:

1. It doesn't limit the arrow keys movement:

2. If you delete or type new characters after arrow key movements, this happens:

---

This is the test script that I used with symfony/console 2.8.x@dev:

require_once __DIR__.'/vendor/autoload.php';

use Symfony\Component\Console\Question\Question;
use Symfony\Component\Console\Helper\QuestionHelper;
use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Console\Output\ConsoleOutput;

$helper = new QuestionHelper();
$question = new Question('Enter the name of the bundle: ', '');
$bundle = $helper->ask(new ArgvInput(), new ConsoleOutput(), $question);

My readline configuration:

did you have the Insert key pressed at the time?

[javiereguiluz]

Not at the same time. I only press one key at a time.

not at the exact same time.. i meant like caps lock. the 2nd example looks like insert was enabled.

[javiereguiluz]

I don't have an insert key in my keyboard. In the examples I only pressed → ← Backspace and the regular letters.

[mvhirsch]

I can reproduce the first bug on my fedora machine with php 5.6.13, but I can't reproduce the second one.

[OskarStark]

I can reproduce the first bug on my osx el capitain with php 5.5.29

the second example works on my machine

[wouterj]

On a vagrant box with PHP 7 and readline 6.3, I am able to reproduce both issues.

[xabbuh]

Status: Reviewed

[javiereguiluz]

Thank you all for verifying this bug. In my opinion, this bug is so important that if nobody offers to solve it, we should revert this feature as soon as possible.