From 0815302dee2b78139832c2080348086a0564836b Mon Sep 17 00:00:00 2001

From: Nick Wellnhofer <wellnhofer@aevum.de>

Date: Fri, 6 Dec 2019 12:27:29 +0100

Subject: [PATCH] Fix freeing of nested documents

Apparently, some libxslt RVTs can contain nested document nodes, see

issue #132. I'm not sure how this happens exactly but it can cause a

segfault in xmlFreeNodeList after the changes in commit 0762c9b6.

Make sure not to touch the (nonexistent) `content` member of xmlDocs.

---

 tree.c | 5 +++++

 1 file changed, 5 insertions(+)

diff --git a/tree.c b/tree.c

index 070670f1..0d7fc98c 100644

--- a/tree.c

+++ b/tree.c

@@ -3708,6 +3708,11 @@ xmlFreeNodeList(xmlNodePtr cur) {

 		(cur->type != XML_XINCLUDE_START) &&

 		(cur->type != XML_XINCLUDE_END) &&

 		(cur->type != XML_ENTITY_REF_NODE) &&

+		(cur->type != XML_DOCUMENT_NODE) &&

+#ifdef LIBXML_DOCB_ENABLED

+		(cur->type != XML_DOCB_DOCUMENT_NODE) &&

+#endif

+		(cur->type != XML_HTML_DOCUMENT_NODE) &&

 		(cur->content != (xmlChar *) &(cur->properties))) {

 		DICT_FREE(cur->content)

 	    }

-- 

2.22.0