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public void testCore ()  {    if (unresolved(4581))      return;        Host coreHost = new LinuxHost(Manager.eventLoop,                                  new File(Config.getPkgDataDir(), "test-core-x86"));    assertNotNull("Core file Host is Null?", coreHost);    Iterator iter = coreHost.getProcIterator();    while (iter.hasNext())      {        Proc proc = (Proc) iter.next();        StacktraceAction stacker;        stacker = new StacktraceAction(proc, new RequestStopEvent(Manager.eventLoop), true, false, false, false)        {          public void addFailed (Object observable, Throwable w)          {            fail("Proc add failed: " + w.getMessage());          }        };        new ProcCoreAction (proc, stacker);        assertRunUntilStop("perform backtrace");                assertNotNull("has backtrace?", stacker.toPrint());      }  }