src/core/ngx_inet.c:118: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

src/core/ngx_inet.c:75:5: <LHS trace>
73.     zero = NULL;
74.     digit = NULL;
75.     len4 = 0;
        ^
76.     nibbles = 0;
77.     word = 0;

src/core/ngx_inet.c:75:5: Assignment
73.     zero = NULL;
74.     digit = NULL;
75.     len4 = 0;
        ^
76.     nibbles = 0;
77.     word = 0;

src/core/ngx_inet.c:118:20: Binary operation: ([0, +oo] - 1):unsigned64
116.             }
117. 
118.             word = ngx_inet_addr(digit, len4 - 1);
                        ^
119.             if (word == INADDR_NONE) {
120.                 return NGX_ERROR;
