Compile the test program below with jikes and run with a fastdebug build with those options

java -server -Xcomp -XX:CompileOnly=ArrayClone.clone ArrayClone

You will see this assertion failure.

VM option 'CompileOnly=ArrayClone.clone'
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/ciObject.hpp:182
#
# HotSpot Virtual Machine Error, assertion failure
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Server VM (1.4.1-internal-debug compiled mode)
#
# assert(is_instance_klass(), "bad cast")
#
# Error ID: /jle_extra/jpe_dev/mma/j2se/sol/1.4.2_08/hotspot/src/share/vm/ci/ciObject.hpp, 182 [ Patched ]
#
# Problematic Thread: prio=5 tid=0x00124308 nid=0x8 runnable
#

The test program:

class ArrayClone implements Cloneable {

  private transient double[] _values;

  public ArrayClone(int count) {
    _values = new double[count];
  }

  public Object clone() {
    try {
      // make a deep copy
      ArrayClone c = (ArrayClone)super.clone();
      c._values = (double[])this._values.clone();
      return c;
    } catch (Throwable t) {
      t.printStackTrace();
    }
    return null;
  }

  public static void main(String args[]) {
    ArrayClone ac = new ArrayClone(12);
    ArrayClone ac2 = (ArrayClone)ac.clone();
    System.err.println(ac);
    System.err.println(ac2);
  }
}


###@###.### 2005-05-17 18:30:58 GMT