server/util_expr.c:781: error: INTEGER_OVERFLOW_L1
  ([-oo, 0] - 1):unsigned32.

server/util_expr.c:695:5: <LHS trace>
693.     ap_parse_node_t *current = root;
694.     const char *error = NULL;
695.     unsigned int regex = 0;
         ^
696.     const char *val;
697.     const char *lval;

server/util_expr.c:695:5: Assignment
693.     ap_parse_node_t *current = root;
694.     const char *error = NULL;
695.     unsigned int regex = 0;
         ^
696.     const char *val;
697.     const char *lval;

server/util_expr.c:781:17: Binary operation: ([-oo, 0] - 1):unsigned32
779.             if (current->right->token.type == TOKEN_RE) {
780.                 current->value = re_check(r, lval, rval, reptr);
781.                 --regex;
                     ^
782.             }
783.             else {
