Problem Description : ReadData32bit test fails with java.lang.ExceptionInInitializerError using -xincgc flag, see below for the jstack message

Tested_Java_Release   	: 1.6.0
Tested_Build          	: B99
Operating System	: Solaris
Machine Name 		: vm-v250-2
Test Case 		: gc/64bit/quicklook/largeheap/ReadData32bit
GC Flags used		: -Xincgc (ONLY),
NOTE : I have tested the test case with ParallelOLDGC/ SerialGC/Parallel GC & was unable to  reproduce the problem
Results : http://vmsqe.sfbay/weekly/mustang/results/1.6.0-rc-b99/ServerVM/SOLSPARC5.10/comp/VM1/vm.gc-22-WEEKLYmtg-VM1-ServerVM-comp-SOLSPARC5.10-2006-09-22-17-59-29/analysis.html#New_Failures

>jstack 7233
Attaching to process ID 7233, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.6.0-rc-b99
Deadlock Detection:

No deadlocks found.

Thread t@10: (state = BLOCKED)
Exception in thread "main" java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at sun.jvm.hotspot.code.CodeCache.class$(CodeCache.java:38)
        at sun.jvm.hotspot.code.CodeCache.initialize(CodeCache.java:39)
        at sun.jvm.hotspot.code.CodeCache.access$000(CodeCache.java:17)
        at sun.jvm.hotspot.code.CodeCache$1.update(CodeCache.java:26)
        at sun.jvm.hotspot.runtime.VM.registerVMInitializedObserver(VM.java:297)
        at sun.jvm.hotspot.code.CodeCache.<clinit>(CodeCache.java:24)
        at sun.jvm.hotspot.runtime.VM.getCodeCache(VM.java:558)
        at sun.jvm.hotspot.runtime.VFrame.newVFrame(VFrame.java:44)
        at sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:207)
        at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:50)
        at sun.jvm.hotspot.tools.JStack.run(JStack.java:41)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
        at sun.jvm.hotspot.tools.JStack.main(JStack.java:58)
Caused by: java.lang.RuntimeException: field "_first_dependent" not found in type nmethod
        at sun.jvm.hotspot.types.basic.BasicType.getField(BasicType.java:156)
        at sun.jvm.hotspot.types.basic.BasicType.getField(BasicType.java:163)
        at sun.jvm.hotspot.types.basic.BasicType.getField(BasicType.java:167)
        at sun.jvm.hotspot.types.basic.BasicType.getCIntegerField(BasicType.java:230)
        at sun.jvm.hotspot.code.NMethod.initialize(NMethod.java:82)
        at sun.jvm.hotspot.code.NMethod.access$000(NMethod.java:19)
        at sun.jvm.hotspot.code.NMethod$1.update(NMethod.java:63)
        at sun.jvm.hotspot.runtime.VM.registerVMInitializedObserver(VM.java:297)
        at sun.jvm.hotspot.code.NMethod.<clinit>(NMethod.java:61)
        ... 15 more
This problem is observed in another testcase too

nsk/regression/b4441517

Results : http://vmsqe.sfbay/weekly/mustang/results/1.6.0-rc-b99/ServerVM/SOLSPARC5.10/comp/VM1/nsk.regression-18-WEEKLYmtg-VM1-ServerVM-comp-SOLSPARC5.10-2006-09-18-22-48-10/analysis.html#New_Failures

Jstack messages :
jstack 8905
Attaching to process ID 8905, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.6.0-rc-b99
Deadlock Detection:

No deadlocks found.

Thread t@10: (state = BLOCKED)
Exception in thread "main" java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at sun.jvm.hotspot.code.CodeCache.class$(CodeCache.java:38)
        at sun.jvm.hotspot.code.CodeCache.initialize(CodeCache.java:39)
        at sun.jvm.hotspot.code.CodeCache.access$000(CodeCache.java:17)
        at sun.jvm.hotspot.code.CodeCache$1.update(CodeCache.java:26)
        at sun.jvm.hotspot.runtime.VM.registerVMInitializedObserver(VM.java:297)
        at sun.jvm.hotspot.code.CodeCache.<clinit>(CodeCache.java:24)
        at sun.jvm.hotspot.runtime.VM.getCodeCache(VM.java:558)
        at sun.jvm.hotspot.runtime.VFrame.newVFrame(VFrame.java:44)
        at sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:207)
        at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:50)
        at sun.jvm.hotspot.tools.JStack.run(JStack.java:41)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
        at sun.jvm.hotspot.tools.JStack.main(JStack.java:58)
Caused by: java.lang.RuntimeException: field "_first_dependent" not found in type nmethod
        at sun.jvm.hotspot.types.basic.BasicType.getField(BasicType.java:156)
        at sun.jvm.hotspot.types.basic.BasicType.getField(BasicType.java:163)
        at sun.jvm.hotspot.types.basic.BasicType.getField(BasicType.java:167)
        at sun.jvm.hotspot.types.basic.BasicType.getCIntegerField(BasicType.java:230)
        at sun.jvm.hotspot.code.NMethod.initialize(NMethod.java:82)
        at sun.jvm.hotspot.code.NMethod.access$000(NMethod.java:19)
        at sun.jvm.hotspot.code.NMethod$1.update(NMethod.java:63)
        at sun.jvm.hotspot.runtime.VM.registerVMInitializedObserver(VM.java:297)
        at sun.jvm.hotspot.code.NMethod.<clinit>(NMethod.java:61)
        ... 15 more