Program: 28953
Project: 28953
Buggy source:
@Override public StreamRuntime clone(String key){
  JoinStreamRuntime joinStreamRuntime=new JoinStreamRuntime(executionPlanContext,metaStateEvent);
  for (  SingleStreamRuntime singleStreamRuntime : singleStreamRuntimeList) {
    joinStreamRuntime.addRuntime((SingleStreamRuntime)singleStreamRuntime.clone(key));
  }
  SingleStreamRuntime leftSingleStreamRuntime=joinStreamRuntime.getSingleStreamRuntimes().get(0);
  SingleStreamRuntime rightSingleStreamRuntime=joinStreamRuntime.getSingleStreamRuntimes().get(1);
  Processor leftWindowProcessor=leftSingleStreamRuntime.getProcessorChain();
  Processor leftPostJoinProcessor=leftWindowProcessor.getNextProcessor();
  while (!(leftPostJoinProcessor instanceof JoinProcessor)) {
    leftWindowProcessor=leftWindowProcessor.getNextProcessor();
    leftPostJoinProcessor=leftWindowProcessor.getNextProcessor();
  }
  Processor rightWindowProcessor=rightSingleStreamRuntime.getProcessorChain();
  Processor rightPostJoinProcessor=rightWindowProcessor.getNextProcessor();
  while (!(rightPostJoinProcessor instanceof JoinProcessor)) {
    rightWindowProcessor=rightWindowProcessor.getNextProcessor();
    rightPostJoinProcessor=rightWindowProcessor.getNextProcessor();
  }
  ((JoinProcessor)rightPostJoinProcessor).setFindableProcessor((FindableProcessor)leftWindowProcessor);
  ((JoinProcessor)leftPostJoinProcessor).setFindableProcessor((FindableProcessor)rightWindowProcessor);
  return joinStreamRuntime;
}

Fixed version (ground truth):
@Override public StreamRuntime clone(String key){
  JoinStreamRuntime joinStreamRuntime=new JoinStreamRuntime(executionPlanContext,metaStateEvent);
  for (  SingleStreamRuntime singleStreamRuntime : singleStreamRuntimeList) {
    joinStreamRuntime.addRuntime((SingleStreamRuntime)singleStreamRuntime.clone(key));
  }
  SingleStreamRuntime leftSingleStreamRuntime=joinStreamRuntime.getSingleStreamRuntimes().get(0);
  SingleStreamRuntime rightSingleStreamRuntime=joinStreamRuntime.getSingleStreamRuntimes().get(1);
  Processor lastLeftProcessor=leftSingleStreamRuntime.getProcessorChain();
  while (!(lastLeftProcessor instanceof JoinProcessor)) {
    lastLeftProcessor=lastLeftProcessor.getNextProcessor();
  }
  JoinProcessor leftPreJoinProcessor=(JoinProcessor)lastLeftProcessor;
  WindowProcessor leftWindowProcessor=(WindowProcessor)leftPreJoinProcessor.getNextProcessor();
  JoinProcessor leftPostJoinProcessor=(JoinProcessor)leftWindowProcessor.getNextProcessor();
  Processor lastRightProcessor=rightSingleStreamRuntime.getProcessorChain();
  while (!(lastRightProcessor instanceof JoinProcessor)) {
    lastRightProcessor=lastRightProcessor.getNextProcessor();
  }
  JoinProcessor rightPreJoinProcessor=(JoinProcessor)lastRightProcessor;
  WindowProcessor rightWindowProcessor=(WindowProcessor)rightPreJoinProcessor.getNextProcessor();
  JoinProcessor rightPostJoinProcessor=(JoinProcessor)rightWindowProcessor.getNextProcessor();
  rightPostJoinProcessor.setFindableProcessor((FindableProcessor)leftWindowProcessor);
  rightPreJoinProcessor.setFindableProcessor((FindableProcessor)leftWindowProcessor);
  leftPreJoinProcessor.setFindableProcessor((FindableProcessor)rightWindowProcessor);
  leftPostJoinProcessor.setFindableProcessor((FindableProcessor)rightWindowProcessor);
  return joinStreamRuntime;
}