The test case for this bug consists of Test.java and NativeRunner.c
It is built using :-

javac Test.java
javah Test
cl /LD -ID:\jdk1.3\include -ID:\bin\jdk1.3\include\win32 NativeRunner.c


*******

To duplicate the bug start the VM as follows :-

java_g -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5001 Test

Next connect jdb and type 'cont' when prompted :-

jdb -connect com.sun.jdi.SocketAttach:hostname=localhost,port=5001


*******
Test.java:-

class NativeRunner extends Thread {

   static { System.loadLibrary("NativeRunner"); }

    private native void doIt();

    public void run() {
        System.out.println("Native Runner started...");
        doIt();
        System.out.println("Native Runner done...");
    }
}

public class Test {
    public static void main(String[] argv) {

        for (;;) {
            try {
                Thread t = new NativeRunner();
                t.start();
                Thread.sleep(500);
                t.stop();
            } catch (InterruptedException e) {
            }
        }
    }
}

*******
NativeRunner.c :-

#include "windows.h"
#include "NativeRunner.h"

JNIEXPORT void JNICALL Java_NativeRunner_doIt(JNIEnv *env, jobject obj)
{
        int i;

        for (i=0; i<20; i++) {
                printf("NativeRunner_doIt...\n");
                Sleep(100);
        }
}

*******
Trace from the VM :-

Native Runner started...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
Native Runner started...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
Native Runner started...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
#
# HotSpot Virtual Machine Error, assertion failure
#
# assert(get_thread(JavaThread::current()) == 0, "current thread already walkable")
#
# Error ID: C:/hotspot\src\share\vm\prims\jvmdi.cpp, 923
#
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
NativeRunner_doIt...
Native Runner done...


*****

Trace from jdb :-

D:\ jdb -connect com.sun.jdi.SocketAttach:hostname=localhost,port=5001
Initializing jdb...
main[1]
VM Started: No frames on the current call stack

main[1] cont
> com.sun.jdi.InternalException: Unexpected JDWP Error: 13
        at com.sun.tools.jdi.JDWPException.toJDIException(JDWPException.java:59)
        at com.sun.tools.jdi.VirtualMachineImpl.resume(VirtualMachineImpl.java:295)
        at com.sun.tools.jdi.EventSetImpl.resume(EventSetImpl.java:589)
        at com.sun.tools.example.debug.tty.EventHandler.run(EventHandler.java:80)
        at java.lang.Thread.run(Thread.java:488)