Add regression tests for GH-10239

Co-authored-by: pezcurrel <33592962+pezcurrel@users.noreply.github.com>

Author: nielsdos

ext/standard/tests/general_functions/gh10239_1.phpt

@@ -0,0 +1,18 @@
+--TEST--
+GH-10239 (proc_close after proc_get_status always returns -1)
+--SKIPIF--
+<?php
+if (PHP_OS != "Linux") die("skip, only for linux");
+if (getenv("SKIP_SLOW_TESTS")) die('skip slow test');
+?>
+--FILE--
+<?php
+$p = proc_open('sleep 1', array(), $foo);
+do {
+    usleep(100000);
+    $s = proc_get_status($p);
+} while ($s['running']);
+echo proc_close($p), PHP_EOL;
+?>
+--EXPECT--
+0

ext/standard/tests/general_functions/gh10239_2.phpt

@@ -0,0 +1,51 @@
+--TEST--
+GH-10239 (proc_close after proc_get_status always returns -1)
+--SKIPIF--
+<?php
+if (PHP_OS != "Linux") die("skip, only for linux");
+if (getenv("SKIP_SLOW_TESTS")) die('skip slow test');
+?>
+--FILE--
+<?php
+$p = proc_open('false', array(), $foo);
+usleep(2 * 1000 * 1000);
+var_dump(proc_get_status($p));
+var_dump(proc_get_status($p));
+?>
+--EXPECTF--
+array(8) {
+  ["command"]=>
+  string(5) "false"
+  ["pid"]=>
+  int(%d)
+  ["running"]=>
+  bool(false)
+  ["signaled"]=>
+  bool(false)
+  ["stopped"]=>
+  bool(false)
+  ["exitcode"]=>
+  int(1)
+  ["termsig"]=>
+  int(0)
+  ["stopsig"]=>
+  int(0)
+}
+array(8) {
+  ["command"]=>
+  string(5) "false"
+  ["pid"]=>
+  int(%d)
+  ["running"]=>
+  bool(false)
+  ["signaled"]=>
+  bool(false)
+  ["stopped"]=>
+  bool(false)
+  ["exitcode"]=>
+  int(1)
+  ["termsig"]=>
+  int(0)
+  ["stopsig"]=>
+  int(0)
+}