PTY mode: Input/output error

[cheack]

Symfony version(s) affected: v4.4.1

Description
When I set PTY mode for process, I get the following error:

fread(): read of 8192 bytes failed with errno=5 Input/output error

OS: official ubuntu:18.04 docker image.
PHP: 7.4.0 from ondrej/php PPA:

PHP 7.4.0 (cli) (built: Nov 28 2019 07:27:06) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.0, Copyright (c), by Zend Technologies
    with Xdebug v2.8.1, Copyright (c) 2002-2019, by Derick Rethans

How to reproduce
Here is a minimal example:

$process = new Process(['echo', '123']);
$process->setPty(true);
$process->run();

[mbardelmeijer]

Able to reproduce this as well on PHP 7.4. Execution of the process is still successful, but the notice is outputted.

Perhaps these need to be suppressed from 7.4?

https://www.php.net/manual/en/migration74.incompatible.php#migration74.incompatible.core.fread-fwrite

fread() and fwrite() will now return FALSE if the operation failed. Previously an empty string or 0 was returned. EAGAIN/EWOULDBLOCK are not considered failures.
These functions now also raise a notice on failure, such as when trying to write to a read-only file resource.

[Alig96]

Also encountering this issue on 7.4 :(

[gedimin45]

Just upgraded to PHP 7.4 and started encountering when \Symfony\Component\Console\Application::renderThrowable is invoked. symfony/console version 4.4.4.