Name: asR10013 Date: 12/08/2000


    
    The sample code below demonstrates incorrect behavior of method
gcd(BigInteger val) of class java.math.BigInteger. Test calls
method 'gcd' with the same argument 1000 times and compares result
values. With jdk1.3.1-b11 in server mode test reports error.

    The problem is reproducible on all Windows platforms and Linux
using jdk1.3.1-b11 Server VM mixed and comp mode.
    Due to this bug the following JCK tests fail:
* api/java_math/BigInteger/index.html#Mod
* api/java_math/BigInteger/index.html#Conversion

---------------------------- test.java -------------------------------
import java.math.*;

class test {
    public static void main(String arg[]) throws Exception {
BigInteger b1, b2,r1,r2;
        b1 = new BigInteger("4857495251917700622069626544940165507318326107275029065226427887152179157410695867164352990853049392980154677179467464264959253875868402179145614765183223333035386422570961312212953787209106291162977315812124382187050108863279392948329049229871503257426368974815540020070314");
b2 = new BigInteger("5450575449322039263801346436025993354938363692088057065418233409385759157289004729237749485081611715227593918052535576013896876840868593858330523542978142413861130900706469825552782891077926246912078331448994490070819294276235531852154491590621549857809398780956711158457374059323767369195846464308646071676931621333069587931538095038317716541447904777");
r1 = b2.gcd(b1);
for (int i=0; i<1000; i++) {
r2 = r1;
            r1 = b2.gcd(b1);
if (!r1.equals(r2)) {
System.out.println("TEST FAILED! Iteration: "+i);
}
        }
    }
}
---------------------------- output ----------------------------------
$ java -server -version
java version "1.3.1beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1beta-b11)
Java HotSpot(TM) Server VM (build 1.3.1beta-b11, mixed mode)
$ java -server -Xfuture test
TEST FAILED! Iteration: 105
$ java -server -Xcomp -Xfuture test
TEST FAILED! Iteration: 36
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