Program: 85651
Project: 85651
Buggy source:
private B registerOutputChannelIfCan(MessageChannel outputChannel){
  if (!(outputChannel instanceof FixedSubscriberChannelPrototype)) {
    this.integrationComponents.add(outputChannel);
    if (this.currentComponent != null) {
      String channelName=null;
      if (outputChannel instanceof MessageChannelReference) {
        channelName=((MessageChannelReference)outputChannel).getName();
      }
      if (this.currentComponent instanceof AbstractReplyProducingMessageHandler) {
        AbstractReplyProducingMessageHandler messageProducer=(AbstractReplyProducingMessageHandler)this.currentComponent;
        if (channelName != null) {
          messageProducer.setOutputChannelName(channelName);
        }
 else {
          messageProducer.setOutputChannel(outputChannel);
        }
      }
 else       if (this.currentComponent instanceof SourcePollingChannelAdapterSpec) {
        SourcePollingChannelAdapterFactoryBean pollingChannelAdapterFactoryBean=((SourcePollingChannelAdapterSpec)this.currentComponent).get().getT1();
        if (channelName != null) {
          pollingChannelAdapterFactoryBean.setOutputChannelName(channelName);
        }
 else {
          pollingChannelAdapterFactoryBean.setOutputChannel(outputChannel);
        }
      }
 else       if (this.currentComponent instanceof AbstractCorrelatingMessageHandler) {
        AbstractCorrelatingMessageHandler messageProducer=(AbstractCorrelatingMessageHandler)this.currentComponent;
        if (channelName != null) {
          messageProducer.setOutputChannelName(channelName);
        }
 else {
          messageProducer.setOutputChannel(outputChannel);
        }
      }
 else       if (this.currentComponent instanceof AbstractMessageRouter) {
        AbstractMessageRouter router=(AbstractMessageRouter)this.currentComponent;
        if (channelName != null) {
          router.setDefaultOutputChannelName(channelName);
        }
 else {
          router.setDefaultOutputChannel(outputChannel);
        }
      }
 else {
        throw new BeanCreationException("String_Node_Str" + this.currentComponent + "String_Node_Str"+ "String_Node_Str");
      }
      this.currentComponent=null;
    }
  }
  return _this();
}

Fixed version (ground truth):
private B registerOutputChannelIfCan(MessageChannel outputChannel){
  if (!(outputChannel instanceof FixedSubscriberChannelPrototype)) {
    this.integrationComponents.add(outputChannel);
    if (this.currentComponent != null) {
      String channelName=null;
      if (outputChannel instanceof MessageChannelReference) {
        channelName=((MessageChannelReference)outputChannel).getName();
      }
      Object currentComponent=this.currentComponent;
      if (AopUtils.isAopProxy(currentComponent)) {
        currentComponent=extractProxyTarget(currentComponent);
      }
      if (currentComponent instanceof AbstractReplyProducingMessageHandler) {
        AbstractReplyProducingMessageHandler messageProducer=(AbstractReplyProducingMessageHandler)currentComponent;
        if (channelName != null) {
          messageProducer.setOutputChannelName(channelName);
        }
 else {
          messageProducer.setOutputChannel(outputChannel);
        }
      }
 else       if (currentComponent instanceof SourcePollingChannelAdapterSpec) {
        SourcePollingChannelAdapterFactoryBean pollingChannelAdapterFactoryBean=((SourcePollingChannelAdapterSpec)currentComponent).get().getT1();
        if (channelName != null) {
          pollingChannelAdapterFactoryBean.setOutputChannelName(channelName);
        }
 else {
          pollingChannelAdapterFactoryBean.setOutputChannel(outputChannel);
        }
      }
 else       if (currentComponent instanceof AbstractCorrelatingMessageHandler) {
        AbstractCorrelatingMessageHandler messageProducer=(AbstractCorrelatingMessageHandler)currentComponent;
        if (channelName != null) {
          messageProducer.setOutputChannelName(channelName);
        }
 else {
          messageProducer.setOutputChannel(outputChannel);
        }
      }
 else       if (this.currentComponent instanceof AbstractMessageRouter) {
        AbstractMessageRouter router=(AbstractMessageRouter)this.currentComponent;
        if (channelName != null) {
          router.setDefaultOutputChannelName(channelName);
        }
 else {
          router.setDefaultOutputChannel(outputChannel);
        }
      }
 else {
        throw new BeanCreationException("String_Node_Str" + currentComponent + "String_Node_Str"+ "String_Node_Str");
      }
      this.currentComponent=null;
    }
  }
  return _this();
}