Nginx: unsafe URI detected while sending response

http://forum.admon.org/webmasters/2498-nginx-unsafe-uri-detected-while-sending-response-client.html

vi src/http/ngx_http_parse.c

ngx_int_t
ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
ngx_str_t *args, ngx_uint_t *flags)
{

return NGX_OK;
u_char ch, *p;
size_t len;

len = uri->len;
p = uri->data;

....