[kamailio/kamailio] http_async_client frees pointer twice(Kamailio 5.0.4) (#1340) - sr-dev

28 Nov 2017

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### Description
When using http_async_client, I'm getting the following error:

Nov 28 08:18:49 tm-kamailio-ingress kamailio[24612]:  3(24635) : <core>
[core/mem/q_malloc.c:483]: qm_free(): BUG: qm_free: freeing already freed pointer
(0x7f62e75130c0), called from http_async_client: async_http.c: set_query_params(616),
first free http_async_client: async_http.h: free_async_query(142) - aborting

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### Troubleshooting

#### Reproduction

route[REQUEST_PERMISSIONS] {
    $var(body) = 0;
    jansson_set("string", "from", "$fU",
"$var(body)");
    jansson_set("string", "to", "$tU",
"$var(body)");
    $http_req(all) = $null;

    $http_req(method) = "POST";

    $http_req(hdr) = "Content-Type: application/json";
    $http_req(hdr) = "Accept: application/json";
    $http_req(hdr) = "Connection: keep-alive";

    $http_req(body) = $var(body);

    $var(re_url)= "localhost:3000/v1/mock/makeCall";

   if (http_async_query("$var(re_url)", "REQUEST_PERMISSIONS_REPLY")
< 0) {
        t_reply("500", "Server Internal Error");
        exit;
    }
}

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#### Debugging Data

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### Possible Solutions

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### Additional Information

  * **Kamailio Version** - output of `kamailio -v`

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* **Operating System**:

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