think\Process::mustRun PHP Méthode

    public function mustRun($callback = null)
    {
        if ($this->isSigchildEnabled() && !$this->enhanceSigchildCompatibility) {
            throw new \RuntimeException('This PHP has been compiled with --enable-sigchild. You must use setEnhanceSigchildCompatibility() to use this method.');
        }
        if (0 !== $this->run($callback)) {
            throw new ProcessFailedException($this);
        }
        return $this;
    }