PHP Warning: Failed to set memory limit to 0 bytes (Current memory usage is 2097152 bytes) in Unknown on line 0

Using the code from the documentation, I get the warning PHP Warning: Failed to set memory limit to 0 bytes (Current memory usage is 2097152 bytes) in Unknown on line 0.

Code

$pool = Pool::create();
foreach (range(1, 5) as $i) {
    $pool[] = async(function () use ($i) {
        // Something to execute in a child process.

    })->then(function (int $output) {
        // Handle output returned from the child process.

    })->catch(function ( $exception) {
        dd($exception);
        // Handle exceptions thrown in the child process.
    });
}

$r = await($pool);

Stacktrace

Spatie\Async\Output\ParallelError {#1428 // app/Collections/CustomerCommentCollection.php:25
  #message: "PHP Warning:  Failed to set memory limit to 0 bytes (Current memory usage is 2097152 bytes) in Unknown on line 0
"
  #code: 0
  #file: "
/var/www/html/vendor
/spatie/async/
src/Output/ParallelError.php"
  #line: 11
  trace: {

/var/www/html/vendor
/spatie/async/
src/Output/ParallelError.php:11 {

Spatie\Async\Output
\
ParallelError::fromException($exception): self …
      › {
      ›     return new self($exception);
      › }
    }

/var/www/html/vendor
/spatie/async/
src/Process/ParallelProcess.php:125 {

Spatie\Async\Process
\
ParallelProcess->resolveErrorOutput(): Throwable …
      › if (! $exception instanceof Throwable) {
      ›     $exception = ParallelError::fromException($exception);
      › }
    }

/var/www/html/vendor
/spatie/async/
src/Process/ProcessCallbacks.php:54 {

Spatie\Async\Process
\
ParallelProcess->triggerError() …
      › {
      ›     $exception = $this->resolveErrorOutput();
      › 
    }

/var/www/html/vendor
/spatie/async/
src/Process/ProcessCallbacks.php:38 {

Spatie\Async\Process
\
ParallelProcess->triggerSuccess() …
      › if ($this->getErrorOutput()) {
      ›     $this->triggerError();
      › 
    }

/var/www/html/vendor
/spatie/async/
src/Pool.php:223 {

Spatie\Async
\
Pool->markAsFinished(Runnable $process) …
      › 
      › $this->results[] = $process->triggerSuccess();
      › 
    }

/var/www/html/vendor
/spatie/async/
src/Pool.php:358 {

Spatie\Async
\
Pool->handleFinishedProcess(int $pid, int $status) …
      › if ($status === 0) {
      ›     $this->markAsFinished($process);
      › 
    }

/var/www/html/vendor
/spatie/async/
src/Pool.php:344 {

Spatie\Async\Pool->Spatie\Async
\
{closure} …
      › 
      ›     $this->handleFinishedProcess($pid, $status['status']);
      › }
    }

/var/www/html/vendor
/spatie/async/
src/Pool.php:168 {

Spatie\Async
\
Pool->wait(?callable $intermediateCallback = null): array …
      › {
      ›     while ($this->inProgress) {
      ›         foreach ($this->inProgress as $process) {
    }

/var/www/html/vendor
/spatie/async/
src/helpers.php:22 {
      await(Pool $pool): array …
      › {
      ›     return $pool->wait();
      › }
    }

/var/www/html
/
app/Collections/CustomerCommentCollection.php:30 {

App\Collections
\
CustomerCommentCollection->attachTextComment() …
      › 
      › $r = await($pool);
      › dd($r);
    }

I have also tried this snippet

use Spatie\Async\Pool;

$pool = Pool::create();

foreach ($things as $thing) {
    $pool->add(function () use ($thing) {
        // Do a thing
    })->then(function ($output) {
        // Handle success
    })->catch(function (Throwable $exception) {
        // Handle exception
    });
}

$pool->wait();

It gives the error sh: 1: exec: : Permission denied.

Im using php 8.3 and the posix and pcntl extensions are both enabled.

$pool->isSupported() returns true.

What could be the issue?

spatie / async

PHP Warning: Failed to set memory limit to 0 bytes (Current memory usage is 2097152 bytes) in Unknown on line 0 #226