69     private $stderr;  variable in Symfony\\Component\\Process\\Process
636 …== $this->callback || ($yieldOut && !feof($this->stdout)) || ($yieldErr && !feof($this->stderr))) {
652                 $err = stream_get_contents($this->stderr, -1, $this->incrementalErrorOutputOffset);
658                         $this->incrementalErrorOutputOffset = ftell($this->stderr);
700         if (false === $ret = stream_get_contents($this->stderr, -1, 0)) {
723         $latest = stream_get_contents($this->stderr, -1, $this->incrementalErrorOutputOffset);
724         $this->incrementalErrorOutputOffset = ftell($this->stderr);
740         ftruncate($this->stderr, 0);
741         fseek($this->stderr, 0);
970         fseek($this->stderr, 0, \SEEK_END);
971         fwrite($this->stderr, $line);
972         fseek($this->stderr, $this->incrementalErrorOutputOffset);
1494         $this->stderr = fopen('php://temp/maxmemory:'.(1024 * 1024), 'w+');