Merge branch 'PHP-8.1' into PHP-8.2

* PHP-8.1:
  Fix run-tests.php hanging when a worker process dies without notice (#9931)

Author: arnaud-lb

run-tests.php

@@ -1504,6 +1504,10 @@ function run_all_tests_parallel(array $test_files, array $env, $redir_tested): v
                     kill_children($workerProcs);
                     error("Could not find worker stdout in array of worker stdouts, THIS SHOULD NOT HAPPEN.");
                 }
+                if (feof($workerSock)) {
+                    kill_children($workerProcs);
+                    error("Worker $i died unexpectedly");
+                }
                 while (false !== ($rawMessage = fgets($workerSock))) {
                     // work around fgets truncating things
                     if (($rawMessageBuffers[$i] ?? '') !== '') {