This bug was reported via nashorn-dev. See also http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-December/005783.html
The test cut-pasted here for convenience.
Example of a Java function I would like to get working in Nashorn / jss javascript below:
public static BigInteger fibonacci(int n) {
BigInteger prev = new BigInteger("0");
if (n == 0) {
return prev;
}
BigInteger next = new BigInteger("1");
if (n == 1) {
return next;
}
BigInteger fib = null;
int i;
for (i = 1; i < n; i++) {
fib = prev.add(next);
prev = next;
next = fib;
}
return fib;
}
We can test with these values:
n=77: 5527939700884757
n=78: 8944394323791464
n=79: 14472334024676221
So far so good. Now I try the - what I think is - equivalent function in
javascript:
function fibonacci(n) {
var BigInteger = Java.type("java.math.BigInteger");
prev = new BigInteger("0");
if (n == 0) return prev;
next = new BigInteger("1");
if (n == 1) return next;
var i, fib = null;
for (i = 1; i < n; i++) {
fib = prev.add(next);
prev = next;
next = fib;
}
return fib;
}
However, now we get different results:
n=77: 5527939700884757
n=78: 8944394323791464
n=79: 14472334024676220
Note that the value for n=79 is off by one.