src/http/ngx_http_request.c:2857: error: Integer Overflow L2
  ([0, `r->main->count`] - 1):unsigned32.

src/http/ngx_http_request.c:2842:1: <LHS trace>
2840. 
2841. 
2842. static void
      ^
2843. ngx_http_close_request(ngx_http_request_t *r, ngx_int_t rc)
2844. {

src/http/ngx_http_request.c:2842:1: Parameter `r->main->count`
2840. 
2841. 
2842. static void
      ^
2843. ngx_http_close_request(ngx_http_request_t *r, ngx_int_t rc)
2844. {

src/http/ngx_http_request.c:2857:5: Binary operation: ([0, r->main->count] - 1):unsigned32
2855.     }
2856. 
2857.     r->count--;
          ^
2858. 
2859.     if (r->count || r->blocked) {
