Signal dispathing after end GearmanWorker::wait

[borro]

1. Set pcntl_async_signals in true
2. Register handler for pcntl_signal
3. Start wait for Gearamn work (GearmanWorker::wait)
4. Send signal when GearmanWorker::wait work.

Result:
Signal handler call after end work GearmanWorker::wait.

Expected Result:
Signal dispatched whet GearmanWorker::wait work.

Run in cli (require php 7.1+, pcntl, pecl-gearman):

#!/usr/bin/env php

<?php

function debug($string, ...$args)
{
    printf('%s: %s', date('Y-m-d H:i:s'),sprintf($string, ...$args));
    echo PHP_EOL;
}

$quit = false;

pcntl_async_signals(true);

pcntl_alarm(1);

pcntl_signal(SIGINT, function ($signo, $signinfo) use (&$quit) {
    $quit = true;
    debug('Signo: %s, Signinfo: %s', $signo, print_r($signinfo, 1));
});
pcntl_signal(SIGALRM, function ($signo, $signinfo) use (&$quit) {
    $quit = true;
    debug('Signo: %s, Signinfo: %s', $signo, print_r($signinfo, 1));
});
debug('SIGINT, SIGALRM inited');

$client = new \GearmanClient();
$client->addServer();

$worker = new \GearmanWorker();
$worker->addOptions(GEARMAN_WORKER_NON_BLOCKING);
$worker->addServer();
$worker->setTimeout(5000);

$worker->addFunction('test', function (\GearmanJob $arg) use ($client) {
    debug('Gearman worker do %s with %s', $arg->functionName(), $arg->workload());
    return 1;
});

debug('Start while worker');
while (!$quit) {
    $worker->work();
    $returnCode = $worker->returnCode();
    if ($returnCode === GEARMAN_NO_JOBS) {
        debug('Wait for jobs');
        $worker->wait();
        continue;
    }
    if ($returnCode === GEARMAN_IO_WAIT) {
        continue;
    }
    if ($returnCode !== GEARMAN_SUCCESS) {
        debug('return_code: %s', $returnCode);
    }
}
debug('Stop while worker');

If $worker->wait(); replace on sleep(10); then script stops almost instantly.

[borro]

I found out that the problem is in the libgearman. gearman/gearmand#230