Terminating a process after its execution does not work correctly

[zKoz210]

After PHP 8.2 exit no longer works as a graceful process termination.

I tried to solve the problem in this way by replacing exit with posix_kill(posix_getpid(), SIGKILL); and it started working correctly, but I'm not sure if the result is correct.

This code will perform only 2 tasks and will hang indefinitely waiting for the end of the processes.

Example:

$results = Fork::new()
    ->concurrent(2)
    ->run(
        fn () => 1,
        fn () => 2,
        fn () => 3,
    );

Laravel: 10.10.1
PHP: 8.2.6
OS (Docker): Alpine (3.18.0)