Name: akC45999 Date: 08/12/98


In the example below second invocation of the method "run" and
therefore of the method "justPrivateMethod" for the static field
"always_null" lead to illegal memory access in VM instead throw the NullPointerException.
The field "always_null" contains null reference.

See log below.

An example:
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import java.io.PrintStream;

public class invokespecial02102 implements Runnable{

public static invokespecial02102 always_null;
public static Runnable always_invokespecial02102 = new invokespecial02102();

        public static void main(String args[]) {
                System.exit(run(args, System.out) + 95/*STATUS_TEMP*/);
        }

        public static int run(String args[], PrintStream out) {
always_invokespecial02102.run();
if(((invokespecial02102)always_invokespecial02102).failed) {
out.println("Failed on first invocation.");
return 2/*STATUS_FAILED*/;
}
always_invokespecial02102.run();
if(((invokespecial02102)always_invokespecial02102).failed) {
out.println("Failed on second invocation.");
return 2/*STATUS_FAILED*/;
}
return 0/*STATUS_PASSED*/;
        }

public void run() { // nothing more than invoker of private method for null objectref
try {
always_null.justPrivateMethod();
} catch (NullPointerException e) {
return;
}
failed = true; // the entire test failed
}

private boolean failed = false;

private void justPrivateMethod() {
failed = true; // test failed if this method ever invoked
}
}

=====================================================
A log:

>java -version
java version "1.2beta4"
Classic VM (build JDK-1.2beta4-K, native threads, symcjit)

>java -verify invokespecial02102

The following message is displayed in window named "java.exe - Application error" when this test running:
<The instruction at "0x50427557" referenced memory at "0x00000018". The memory could not be "written".>

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