From 572538c6d7f1e64ce78ef70abe974e3466c53e38 Mon Sep 17 00:00:00 2001
From: Eric <esclim@gmail.com>
Date: Tue, 17 Dec 2019 15:25:58 -0500
Subject: [PATCH] Update clean.c

Protect against NULL in PruneSetion.
 A Null node happens when pruning unbalanced <![if ...]> <![endif]>.
---
 src/clean.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/clean.c b/src/clean.c
index e96dd3f..dc6cac1 100644
--- a/src/clean.c
+++ b/src/clean.c
@@ -1638,6 +1638,9 @@ static Node* PruneSection( TidyDocImpl* doc, Node *node )
 
     for (;;)
     {
+        if (node == NULL)
+            return NULL;
+        
         ctmbstr lexbuf = lexer->lexbuf + node->start;
         if ( TY_(tmbstrncmp)(lexbuf, "if !supportEmptyParas", 21) == 0 )
         {