Program: 30379
Project: 30379
Buggy source:
@Override public <T extends ConfigBeanProxy>NotProcessed changed(TYPE type,Class<T> tc,T t){
  NotProcessed result=null;
  if (tc == Profiler.class) {
    result=new NotProcessed("String_Node_Str");
  }
 else   if (tc == Property.class && t.getParent().getClass() == JavaConfig.class) {
    result=new NotProcessed("String_Node_Str");
  }
 else   if (tc == JavaConfig.class) {
    final JavaConfig njc=(JavaConfig)t;
    logFine(type,njc);
    final List<String> curProps=new ArrayList<String>(njc.getJvmOptions());
    final boolean jvmOptionsWereChanged=!oldProps.equals(curProps);
    final List<String> reasons=handle(oldProps,curProps);
    oldProps=curProps;
    final Map<String,String> curAttrs=collectAttrs(njc);
    reasons.addAll(handleAttrs(oldAttrs,curAttrs));
    oldAttrs=curAttrs;
    result=reasons.isEmpty() ? null : new NotProcessed(CombinedJavaConfigSystemPropertyListener.toString(reasons));
  }
 else   if (tc == SystemProperty.class) {
    final SystemProperty sp=(SystemProperty)t;
    ConfigBeanProxy proxy=sp.getParent();
    ConfigView p=ConfigSupport.getImpl(proxy);
    if (p == ConfigSupport.getImpl(server) || p == ConfigSupport.getImpl(config) || (cluster != null && p == ConfigSupport.getImpl(cluster)) || p == ConfigSupport.getImpl(domain)) {
      String pname=sp.getName();
      if (referencesProperty(pname,oldProps) || referencesProperty(pname,oldAttrs.values())) {
        result=new NotProcessed("String_Node_Str" + pname + "String_Node_Str");
      }
    }
    if (type == TYPE.ADD || type == TYPE.CHANGE) {
      if (proxy instanceof Domain) {
        return addToDomain(sp);
      }
 else       if (proxy instanceof Config) {
        return addToConfig(sp);
      }
 else       if (proxy instanceof Cluster) {
        return addToCluster(sp);
      }
 else {
        if (proxy instanceof Server) {
          Server changedServer=(Server)proxy;
          String changedServerName=changedServer.getName();
          String thisServerName=server.getName();
          if (changedServerName.equals(thisServerName)) {
            return addToServer(sp);
          }
        }
      }
    }
 else     if (type == TYPE.REMOVE) {
      if (proxy instanceof Domain) {
        return removeFromDomain(sp);
      }
 else       if (proxy instanceof Config) {
        return removeFromConfig(sp);
      }
 else       if (proxy instanceof Cluster) {
        return removeFromCluster(sp);
      }
 else {
        return removeFromServer(sp);
      }
    }
  }
 else {
  }
  return result;
}

Fixed version (ground truth):
@Override public <T extends ConfigBeanProxy>NotProcessed changed(TYPE type,Class<T> tc,T t){
  NotProcessed result=null;
  if (tc == Profiler.class) {
    result=new NotProcessed("String_Node_Str");
  }
 else   if (tc == Property.class && t.getParent().getClass() == JavaConfig.class) {
    result=new NotProcessed("String_Node_Str");
  }
 else   if (tc == JavaConfig.class && t instanceof JavaConfig) {
    final JavaConfig njc=(JavaConfig)t;
    logFine(type,njc);
    final List<String> curProps=new ArrayList<String>(njc.getJvmOptions());
    final boolean jvmOptionsWereChanged=!oldProps.equals(curProps);
    final List<String> reasons=handle(oldProps,curProps);
    oldProps=curProps;
    final Map<String,String> curAttrs=collectAttrs(njc);
    reasons.addAll(handleAttrs(oldAttrs,curAttrs));
    oldAttrs=curAttrs;
    result=reasons.isEmpty() ? null : new NotProcessed(CombinedJavaConfigSystemPropertyListener.toString(reasons));
  }
 else   if (tc == SystemProperty.class && t instanceof SystemProperty) {
    final SystemProperty sp=(SystemProperty)t;
    ConfigBeanProxy proxy=sp.getParent();
    ConfigView p=ConfigSupport.getImpl(proxy);
    if (p == ConfigSupport.getImpl(server) || p == ConfigSupport.getImpl(config) || (cluster != null && p == ConfigSupport.getImpl(cluster)) || p == ConfigSupport.getImpl(domain)) {
      String pname=sp.getName();
      if (referencesProperty(pname,oldProps) || referencesProperty(pname,oldAttrs.values())) {
        result=new NotProcessed("String_Node_Str" + pname + "String_Node_Str");
      }
    }
    if (type == TYPE.ADD || type == TYPE.CHANGE) {
      if (proxy instanceof Domain) {
        return addToDomain(sp);
      }
 else       if (proxy instanceof Config) {
        return addToConfig(sp);
      }
 else       if (proxy instanceof Cluster) {
        return addToCluster(sp);
      }
 else {
        if (proxy instanceof Server) {
          Server changedServer=(Server)proxy;
          String changedServerName=changedServer.getName();
          String thisServerName=server.getName();
          if (changedServerName.equals(thisServerName)) {
            return addToServer(sp);
          }
        }
      }
    }
 else     if (type == TYPE.REMOVE) {
      if (proxy instanceof Domain) {
        return removeFromDomain(sp);
      }
 else       if (proxy instanceof Config) {
        return removeFromConfig(sp);
      }
 else       if (proxy instanceof Cluster) {
        return removeFromCluster(sp);
      }
 else {
        return removeFromServer(sp);
      }
    }
  }
 else {
  }
  return result;
}