Merge branch '5.4' into 6.4

* 5.4:
  Mitigate PHPUnit deprecations
  [TwigBundle] Add support for resetting globals between HTTP requests
  [Validator] Add Catalan and Spanish translation for `Week` constraint
  Don't use is_resource() on non-streams
  [Ldap] Fix extension deprecation

Process.php

@@ -346,7 +346,7 @@ public function start(?callable $callback = null, array $env = [])
 
         $process = @proc_open($commandline, $descriptors, $this->processPipes->pipes, $this->cwd, $envPairs, $this->options);
 
-        if (!\is_resource($process)) {
+        if (!$process) {
             throw new RuntimeException('Unable to launch a new process.');
         }
         $this->process = $process;
@@ -1400,8 +1400,9 @@ private function readPipes(bool $blocking, bool $close): void
     private function close(): int
     {
         $this->processPipes->close();
-        if (\is_resource($this->process)) {
+        if ($this->process) {
             proc_close($this->process);
+            $this->process = null;
         }
         $this->exitcode = $this->processInformation['exitcode'];
         $this->status = self::STATUS_TERMINATED;