The attached test program showed a crash down or exception thrown on jdk6u4 but the problem could not be seen n in jdk6u3.

Below are the results reported by one of our licensees.

- The problem occurs against jdk 7(b59) on Linux/x86(64bit).
- The problem occurs against jdk 6u13 on Linux/x86(32bit).
- The problem does Not occurs against jdk 6u11, 6u14 on Windows/x86(32bit).
- The problem will disappear if the number of fields in class TestObject100K_021B is decreased(remove all private long fields).
- When -XX:+UseSerialGC is specified, there are some references pointing Eden region that should point Survivor or Tenured space. We suspect wrong operation exists in pointer update when copying objects.

To reproduce:
(1)unzip the attached.
(2)javac *.java
(3)java MainTest_021_02

Test results:

On jdk 6u3:
[pattern 1]: no flags specified
> java MainTest_021_02
TestObject100K@55f33675
Test Passed

[pattern 2]: specifying -XX:+UseSerialGC
> java -XX:+UseSerialGC MainTest_021_02
TestObject100K@26ee7a14
Test Passed

On jdk 6u13: proglem occurred
> java -version
java version "1.6.0_13"
Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02, mixed mode)

[pattern 1]: no flags specified
> java MainTest_021_02
#
# An unexpected error has been detected by Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x0000002a95c14587, pid=18243, tid=1076017504
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (11.3-b02 mixed mode linux-amd64)
# Problematic frame:
# V [libjvm.so+0x589587]
#
# An error report file with more information is saved as:
# /home/okada/for_sun/hs_err_pid18243.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
abort

[pattern 2]: specifying -XX:+UseSerialGC
> java -XX:+UseSerialGC MainTest_021_02
java.lang.NullPointerException
        at MainTest_021_02.main(MainTest_021_02.java:49)
The name of failed tests for tracking purposes:
gc/gctests/LargeObjects/large003
gc/gctests/LargeObjects/large004
gc/gctests/LargeObjects/large005