Name: sg39081 Date: 08/04/97


The following program causes jdb to throw a nullpointerexception.


public class ab {
  public static void main(String[] argv) {
    try {
      throw new RuntimeException("");
    } catch (Exception E) {
     E.printStackTrace(new java.io.PrintStream(System.out));
      java.io.PrintWriter pw = new java.io.PrintWriter(System.out);
      pw.println("foo");
      E.printStackTrace(pw);
      pw.flush();
      // pw.close();
    }
  }
}

D:\temp>jdb ab
Initializing jdb...
0xf75358:class(ab)
> stop at ab:9
Breakpoint set at ab:9
> run
run ab
java.lang.RuntimeException: running ...
main[1]
        at ab.main(ab.java:4)
        at sun.tools.debug.MainThread.run(Agent.java:55)

Breakpoint hit:
Fatal exception: java.lang.Exception: java.lang.NullPointerException
java.lang.Exception: java.lang.NullPointerException
        at sun.tools.debug.RemoteAgent.getReply(RemoteAgent.java:408)
        at sun.tools.debug.RemoteAgent.dumpStack(RemoteAgent.java:527)
        at sun.tools.debug.RemoteThread.dumpStack(RemoteThread.java:148)
        at sun.tools.ttydebug.TTY.breakpointEvent(TTY.java:85)
        at sun.tools.debug.AgentIn.run(AgentIn.java:67)
        at java.lang.Thread.run(Thread.java:470)

main[1] quit

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