From 8c5d5a0effb57b331d5042863dc3b9075dff1088 Mon Sep 17 00:00:00 2001
From: Michael Roth <mdroth@linux.vnet.ibm.com>
Date: Wed, 1 Jun 2011 12:15:00 -0500
Subject: [PATCH] json-parser: add handling for NULL token list

Currently a NULL token list will crash the parser, instead we have it
pass back a NULL QObject.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 json-parser.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/json-parser.c b/json-parser.c
index 58e973b..849e215 100644
--- a/json-parser.c
+++ b/json-parser.c
@@ -633,9 +633,13 @@ QObject *json_parser_parse(QList *tokens, va_list *ap)
 QObject *json_parser_parse_err(QList *tokens, va_list *ap, Error **errp)
 {
     JSONParserContext ctxt = {};
-    QList *working = qlist_copy(tokens);
+    QList *working;
     QObject *result;
 
+    if (!tokens) {
+        return NULL;
+    }
+    working = qlist_copy(tokens);
     result = parse_value(&ctxt, &working, ap);
 
     QDECREF(working);
-- 
2.7.4