Merge branch '6.4' into 7.0

* 6.4:
  [Process] Fix failing tests causing segfaults

Author: xabbuh

Tests/ProcessTest.php

@@ -1582,7 +1582,7 @@ public function testFailingProcessWithMultipleCallsToProcGetStatus()
      */
     public function testLongRunningProcessWithMultipleCallsToProcGetStatus()
     {
-        $process = $this->getProcess('php -r "sleep(1); echo \'done\';"');
+        $process = $this->getProcess('sleep 1 && echo "done" && php -r "exit(0);"');
         $process->start(static function () use ($process) {
             return $process->isRunning();
         });
@@ -1597,7 +1597,7 @@ public function testLongRunningProcessWithMultipleCallsToProcGetStatus()
      */
     public function testLongRunningProcessWithMultipleCallsToProcGetStatusError()
     {
-        $process = $this->getProcess('php -r "sleep(1); echo \'failure\'; exit(123);"');
+        $process = $this->getProcess('sleep 1 && echo "failure" && php -r "exit(123);"');
         $process->start(static function () use ($process) {
             return $process->isRunning();
         });