From 2065d51a18e3aa4e08ff806b5a8994fd4ad05746 Mon Sep 17 00:00:00 2001
From: Dmitry Stogov <dmitry@zend.com>
Date: Mon, 30 Oct 2017 12:04:15 +0300
Subject: [PATCH] Better fix for bug #75451 (Assertion fails while foreach on
 empty xpath query)

---
 ext/dom/dom_iterators.c | 8 ++++----
 ext/dom/php_dom.h       | 1 +
 ext/dom/xpath.c         | 5 ++++-
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/ext/dom/dom_iterators.c b/ext/dom/dom_iterators.c
index 02f1e3c472..27bd960c4a 100644
--- a/ext/dom/dom_iterators.c
+++ b/ext/dom/dom_iterators.c
@@ -197,8 +197,8 @@ static void php_dom_iterator_move_forward(zend_object_iterator *iter) /* {{{ */
 			objmap->nodetype != XML_NOTATION_NODE) {
 			if (objmap->nodetype == DOM_NODESET) {
 				nodeht = HASH_OF(&objmap->baseobj_zv);
-				zend_hash_move_forward(nodeht);
-				if ((entry = zend_hash_get_current_data(nodeht))) {
+				zend_hash_move_forward_ex(nodeht, &iterator->pos);
+				if ((entry = zend_hash_get_current_data_ex(nodeht, &iterator->pos))) {
 					zval_ptr_dtor(&iterator->curobj);
 					ZVAL_UNDEF(&iterator->curobj);
 					ZVAL_COPY(&iterator->curobj, entry);
@@ -281,8 +281,8 @@ zend_object_iterator *php_dom_get_iterator(zend_class_entry *ce, zval *object, i
 			objmap->nodetype != XML_NOTATION_NODE) {
 			if (objmap->nodetype == DOM_NODESET) {
 				nodeht = HASH_OF(&objmap->baseobj_zv);
-				zend_hash_internal_pointer_reset(nodeht);
-				if ((entry = zend_hash_get_current_data(nodeht))) {
+				zend_hash_internal_pointer_reset_ex(nodeht, &iterator->pos);
+				if ((entry = zend_hash_get_current_data_ex(nodeht, &iterator->pos))) {
 					ZVAL_COPY(&iterator->curobj, entry);
 				}
 			} else {
diff --git a/ext/dom/php_dom.h b/ext/dom/php_dom.h
index 30d143c351..8bcbcd8306 100644
--- a/ext/dom/php_dom.h
+++ b/ext/dom/php_dom.h
@@ -93,6 +93,7 @@ typedef struct _dom_nnodemap_object {
 typedef struct {
 	zend_object_iterator intern;
 	zval curobj;
+	HashPosition pos;
 } php_dom_iterator;
 
 #include "dom_fe.h"
diff --git a/ext/dom/xpath.c b/ext/dom/xpath.c
index 31e4dc98b4..f0b908ccf3 100644
--- a/ext/dom/xpath.c
+++ b/ext/dom/xpath.c
@@ -432,8 +432,9 @@ static void php_xpath_eval(INTERNAL_FUNCTION_PARAMETERS, int type) /* {{{ */
 			int i;
 			xmlNodeSetPtr nodesetp;
 
-			array_init(&retval);
 			if (xpathobjp->type == XPATH_NODESET && NULL != (nodesetp = xpathobjp->nodesetval) && nodesetp->nodeNr) {
+
+				array_init(&retval);
 				for (i = 0; i < nodesetp->nodeNr; i++) {
 					xmlNodePtr node = nodesetp->nodeTab[i];
 					zval child;
@@ -459,6 +460,8 @@ static void php_xpath_eval(INTERNAL_FUNCTION_PARAMETERS, int type) /* {{{ */
 					php_dom_create_object(node, &child, &intern->dom);
 					add_next_index_zval(&retval, &child);
 				}
+			} else {
+				ZVAL_EMPTY_ARRAY(&retval);
 			}
 			php_dom_create_interator(return_value, DOM_NODELIST);
 			nodeobj = Z_DOMOBJ_P(return_value);
-- 
2.40.0