Processes are being terminated unexpectedly

[petronetto]

I'm not sure if I'm doing something wrong or if it's a bug, but when I run the code below, more often than not one or more tasks don't finish.

Fork::new()
    ->run(
        function () {
            foreach (range(1, 1000) as $i) {
                usleep(rand(300, 3000));
            }

            echo "## Done #1" . PHP_EOL;
        },
        function () {
            foreach (range(1, 1000) as $i) {
                usleep(rand(300, 3000));
            }

            echo "## Done #2" . PHP_EOL;
        },
        function () {
            foreach (range(1, 1000) as $i) {
                usleep(rand(300, 3000));
            }

            echo "## Done #3" . PHP_EOL;
        },
    );

I'm running on a MacBook with M2 chip using Docker, below the Dockerfile I run the tests:

FROM php:8.2-cli-bookworm as base

# Install system dependencies
RUN set -e \
  && apt update \
  && apt install -y \
    git \
    unzip \
    libzip-dev \
    procps \
    autoconf \
    automake \
    gcc \
    make \
    g++ \
    coreutils \
    libtool \
    libssl-dev \
    libpq-dev \
    libicu-dev \
    libpcre3-dev \
    zlib1g-dev

# Install igbinary extension
RUN pecl install -o -f igbinary \
  && rm -rf /tmp/pear \
  && docker-php-ext-enable igbinary

# Install Redis extension with igbinary support
RUN cd /tmp && git clone https://github.com/phpredis/phpredis.git \
    && cd phpredis \
    && phpize \
    && ./configure --enable-redis-igbinary \
    && make && make install \
    && docker-php-ext-enable redis

# Install PHP extensions
RUN docker-php-ext-install \
    intl \
    posix \
    sockets \
    pcntl \
    zip

# Install Composer globally
RUN curl https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

# Copy PHP configuration files
COPY docker/php/config/common/* /usr/local/etc/php/conf.d/

# Add source code into docker image
COPY . /app

WORKDIR /app