Apply #[\NoDiscard] to flock()

Author: TimWolla

ext/standard/basic_functions.stub.php

@@ -2732,6 +2732,7 @@ function proc_nice(int $priority): bool {}
  * @param resource $stream
  * @param int $would_block
  */
+#[\NoDiscard(message: "as locking the stream might have failed")]
 function flock($stream, int $operation, &$would_block = null): bool {}
 
 /**

ext/standard/basic_functions_arginfo.h

@@ -19,7 +19,7 @@ class test_wrapper extends test_wrapper_base {
 }
 function test($name, $fd, $mode) {
     echo "------ $name: -------\n";
-    flock($fd, $mode);
+    (void)flock($fd, $mode);
     $data = stream_get_meta_data($fd);
     var_dump($data['wrapper_data']->mode === $mode);
 }