Revert "Fixed bug #79029 (Use After Free's in XMLReader / XMLWriter)"

This reverts commit d8ad2f4.

Author: laruence

NEWS

@@ -48,9 +48,6 @@ PHP                                                                        NEWS
   . Fixed bug #79000 (Non-blocking socket stream reports EAGAIN as error).
     (Nikita)
 
-- Libxml:
-  . Fixed bug #79029 (Use After Free's in XMLReader / XMLWriter). (Laruence)
-
 18 Dec 2019, PHP 7.4.1
 
 - Core:

ext/libxml/libxml.c

@@ -355,8 +355,6 @@ static void *php_libxml_streams_IO_open_wrapper(const char *filename, const char
 	context = php_stream_context_from_zval(Z_ISUNDEF(LIBXML(stream_context))? NULL : &LIBXML(stream_context), 0);
 
 	ret_val = php_stream_open_wrapper_ex(path_to_open, (char *)mode, REPORT_ERRORS, NULL, context);
-	/* Prevent from closing this by fclose() */
-	((php_stream*)ret_val)->flags |= PHP_STREAM_FLAG_NO_FCLOSE;
 	if (isescaped) {
 		xmlFree(resolved_path);
 	}

ext/xmlwriter/tests/bug79029.phpt

@@ -0,0 +1,13 @@
+--TEST--
+#79029 (Use After Free's in XMLReader / XMLWriter)
+--SKIPIF--
+<?php if (!extension_loaded("xmlwriter")) print "skip"; ?>
+--FILE--
+<?php
+$x = array( new XMLWriter() );
+$x[0]->openUri("a");
+$x[0]->startComment();
+?>
+okey
+--EXPECT--
+okey