From c4b82fe1d5cac8d87cdb5ae54771964485f3ff3f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9opold=20Jacquot?= <leopold.jacquot@infomaniak.com>
Date: Wed, 4 Dec 2019 15:14:50 +0100
Subject: [PATCH] Add unit test for bug #78902

---
 ext/standard/tests/streams/bug78902.phpt | 29 ++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 ext/standard/tests/streams/bug78902.phpt

diff --git a/ext/standard/tests/streams/bug78902.phpt b/ext/standard/tests/streams/bug78902.phpt
new file mode 100644
index 0000000000000..319d04e195443
--- /dev/null
+++ b/ext/standard/tests/streams/bug78902.phpt
@@ -0,0 +1,29 @@
+--TEST--
+Bug #78902: Memory leak when using stream_filter_append
+--FILE--
+<?php
+ini_set('memory_limit','512k');
+
+/** create temporary file 2mb file */
+$tmp_file_name = tempnam(sys_get_temp_dir(), 'test_');
+$fp = fopen($tmp_file_name, 'w+');
+$size = 1024 * 1024 * 2; // 2mb
+$chunk = 1024;
+while ($size > 0) {
+    fputs($fp, str_pad('', min($chunk,$size)));
+    $size -= $chunk;
+}
+fclose($fp);
+
+$fp = fopen($tmp_file_name, 'r');
+stream_filter_append($fp, "string.toupper");
+while (!feof($fp)) {
+    fread($fp, 1);
+}
+fclose($fp);
+var_dump(true);
+?>
+--XFAIL--
+This bug was introduce in PHP 7.3.11 an is still open
+--EXPECT--
+bool(true)