Parsing JSON array in C

I have the following JSON returned from the server, and I'm trying to access to the Values (timestamp/data):

{
   "queries": [
     {
       "sample_size": 1,
       "results": [
         {
           "name": "data",
           "group_by": [
             {
               "name": "type",
               "type": "number"
             }
           ],
           "tags": {
             "hostname": [
               "host"
             ]
           },
           "values": [
             [
               1438775895302,
               143
             ]
           ]
         }
       ]
     }
   ]
 }

I am using json-c, and am using slightly modified version of the complete json parser. However I keep getting a segmentation fault (core dumped) when attempting to access the values section using json_parse_array.

How would I go about accessing the values section?

via Chebli Mohamed