gistfile1.txt

import org.junit.Assert;
final class Loop extends Exception {
    Loop(long max, Iter iter) throws Exception {
        super(iter);
        try {
            Assert.assertTrue(max > 0);
            throw new Loop(max - 1, new Iter(iter));
        } catch (final AssertionError fal) {
            throw new Exception(iter);
        }
    }
}
final class Iter extends Exception {
    final long a;
    final long b;

    Iter(final long a, final long b) {
        super(String.format("%d", a), null);
        this.a = a;
        this.b = b;
    }
    Iter(final Iter iter) {
        super(String.format("%d", iter.a), iter);
        this.a = iter.b;
        this.b = iter.a + iter.b;
    }
}
public final class Fibafail {
    public static void main(final String[] args) throws Exception {
        throw new Loop(20, new Iter(1, 1));
    }
}