Fix start ready processes

Author: sbarboyon-ext

changelog.md

@@ -1,5 +1,7 @@
 ### master
 
+- Fix start ready processes when maximum paralell processes is not configured or value is `null`
+
 ### [0.7.1](../../compare/0.7.0...0.7.1) - 2022-03-07
 
 - Add `pcntl` into Docker images

src/Console/Application/ParallelProcessesApplication.php

@@ -227,7 +227,10 @@ protected function startReadyProcesses(): self
                     $readyProcess->start();
                 }
 
-                if ($this->getProcesses()->countRunning() >= $maximumParallelProcesses) {
+                if (
+                    is_int($maximumParallelProcesses)
+                    && $this->getProcesses()->countRunning() >= $maximumParallelProcesses
+                ) {
                     break;
                 }
             }