Add persistent stream context shutdown reproducer

Author: morrisonlevi

NEWS

@@ -113,6 +113,7 @@ PHP                                                                        NEWS
   . Fixed three Windows-only proc_open() defects: an uninitialized
     PROCESS_INFORMATION, an indeterminate comspec pointer after a failed
     lookup, and an unchecked CreateFileA() failure. (Ilia Alshanetsky)
+  . Fix persistent stream context lifetime during shutdown (Levi Morrison)
 
 - XSL:
   . Fixed bug GH-23730 (use-after-free when XSLTProcessor::importStylesheet()

ext/standard/tests/streams/persistent_stream_context_shutdown.phpt

@@ -0,0 +1,63 @@
+--TEST--
+Persistent stream contexts created during resource shutdown are detached
+--FILE--
+<?php
+
+if (($argv[1] ?? null) !== 'child') {
+    // Wait for the trigger's final status because the crash occurs after stdout closes.
+    $process = proc_open(
+        [PHP_BINARY, '-n', __FILE__, 'child'],
+        [
+            0 => ['pipe', 'r'],
+            1 => ['pipe', 'w'],
+            2 => ['pipe', 'w'],
+        ],
+        $pipes,
+    );
+    fclose($pipes[0]);
+    stream_get_contents($pipes[1]);
+    fclose($pipes[1]);
+    stream_get_contents($pipes[2]);
+    fclose($pipes[2]);
+    var_dump(proc_close($process));
+    return;
+}
+
+final class LateContextWrapper
+{
+    public $context;
+    private string $address;
+
+    public function stream_open($path, $mode, $options, &$opened_path): bool
+    {
+        $this->address = substr($path, strlen('late-context://'));
+        return true;
+    }
+
+    public function stream_close(): void
+    {
+        $context = stream_context_create([
+            'socket' => ['tcp_nodelay' => true],
+        ]);
+        stream_socket_client(
+            $this->address,
+            $errno,
+            $error,
+            1,
+            STREAM_CLIENT_CONNECT | STREAM_CLIENT_PERSISTENT,
+            $context,
+        );
+    }
+}
+
+$server = stream_socket_server('tcp://127.0.0.1:0', $errno, $error);
+if (!$server) {
+    die("server failed: $error ($errno)\n");
+}
+
+stream_wrapper_register('late-context', LateContextWrapper::class);
+$trigger = fopen('late-context://tcp://' . stream_socket_get_name($server, false), 'r');
+
+?>
+--EXPECT--
+int(0)