63     private $fallbackStatus = [];  variable in Symfony\\Component\\Process\\Process
347             $this->fallbackStatus['pid'] = (int) fgets($this->processPipes->pipes[3]);
887             if (isset($this->fallbackStatus['pid'])) {
888                 unset($this->fallbackStatus['pid']);
1430 …  if ($this->fallbackStatus && $this->enhanceSigchildCompatibility && $this->isSigchildEnabled()) {
1431             $this->processInformation = $this->fallbackStatus + $this->processInformation;
1515             } elseif (!isset($this->fallbackStatus['signaled'])) {
1516                 $this->fallbackStatus['exitcode'] = (int) $data;
1561         $this->fallbackStatus = [];
1621         $this->fallbackStatus['signaled'] = true;
1622         $this->fallbackStatus['exitcode'] = -1;
1623         $this->fallbackStatus['termsig'] = $this->latestSignal;