Program: 121826
Project: 121826
Buggy source:
public static void updateComponentList(IElement elem,IElementParameter param){
  if (elem instanceof INode) {
    INode currentNode=(INode)elem;
    List<INode> nodeList=null;
    IJobletProviderService jobletService=getJobletProviderService(param);
    if (jobletService != null) {
      nodeList=jobletService.getConnNodesForInputTrigger(currentNode,param);
    }
 else {
      List<INode> list=(List<INode>)((Node)elem).getProcess().getNodesOfType(param.getFilter());
      nodeList=new ArrayList<INode>();
      if (list != null) {
        for (        INode datanode : list) {
          if (datanode.getUniqueName() != null && !datanode.getUniqueName().equals(StatsAndLogsManager.CONNECTION_UID)) {
            nodeList.add(datanode);
          }
        }
      }
    }
    List<INode> jobletnodeList=new ArrayList<INode>(nodeList);
    if (((Node)elem).getJobletNode() != null) {
      String jobletUniName=((Node)elem).getJobletNode().getUniqueName();
      for (      INode node : jobletnodeList) {
        if (!node.getUniqueName().startsWith(jobletUniName)) {
          nodeList.remove(node);
        }
      }
    }
    List<String> componentDisplayNames=new ArrayList<String>();
    List<String> componentUniqueNames=new ArrayList<String>();
    for (    INode node : nodeList) {
      String uniqueName=node.getUniqueName();
      if (uniqueName.equals(currentNode.getUniqueName())) {
        continue;
      }
      String displayName=(String)node.getElementParameter("String_Node_Str").getValue();
      if (displayName == null) {
        displayName=uniqueName + "String_Node_Str" + displayName;
      }
      if (displayName.indexOf("String_Node_Str") != -1) {
        displayName=displayName.replaceAll("String_Node_Str",uniqueName);
      }
 else {
        displayName=uniqueName + "String_Node_Str" + displayName;
      }
{
        componentUniqueNames.add(uniqueName);
        componentDisplayNames.add(displayName);
      }
    }
    String[] componentNameList=(String[])componentDisplayNames.toArray(new String[0]);
    String[] componentValueList=(String[])componentUniqueNames.toArray(new String[0]);
    param.setListItemsDisplayName(componentNameList);
    param.setListItemsValue(componentValueList);
    Object value=param.getValue();
    if (!componentUniqueNames.contains(value)) {
      String newValue=null;
      if ((componentUniqueNames.size() > 0)) {
        if (value == null || value.equals("String_Node_Str")) {
          elem.setPropertyValue(getParameterName(param),componentValueList[0]);
          if (elem instanceof Node) {
            Node node=(Node)elem;
            node.checkAndRefreshNode();
            ((IProcess2)node.getProcess()).setProcessModified(true);
          }
 else           if (elem instanceof Connection) {
            ((IProcess2)((Connection)elem).getSource().getProcess()).setProcessModified(true);
          }
        }
 else {
          newValue=componentValueList[0];
        }
      }
 else {
        newValue="String_Node_Str";
      }
      if (!("String_Node_Str".equals(newValue)) && newValue != null) {
        IEditorPart part=PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
        if (part instanceof AbstractMultiPageTalendEditor) {
          AbstractTalendEditor te=((AbstractMultiPageTalendEditor)part).getTalendEditor();
          CommandStack cmdStack=(CommandStack)te.getAdapter(CommandStack.class);
          cmdStack.execute(new PropertyChangeCommand(elem,getParameterName(param),newValue));
        }
      }
    }
  }
}

Fixed version (ground truth):
public static void updateComponentList(IElement elem,IElementParameter param){
  if (elem instanceof INode) {
    INode currentNode=(INode)elem;
    List<INode> nodeList=null;
    IJobletProviderService jobletService=getJobletProviderService(param);
    if (jobletService != null) {
      nodeList=jobletService.getConnNodesForInputTrigger(currentNode,param);
    }
 else {
      List<INode> list=(List<INode>)((Node)elem).getProcess().getNodesOfType(param.getFilter());
      nodeList=new ArrayList<INode>();
      if (list != null) {
        for (        INode datanode : list) {
          if (datanode.getUniqueName() != null && !datanode.getUniqueName().equals(StatsAndLogsManager.CONNECTION_UID)) {
            nodeList.add(datanode);
          }
        }
      }
    }
    List<INode> jobletnodeList=new ArrayList<INode>(nodeList);
    if (((Node)elem).getJobletNode() != null) {
      String jobletUniName=((Node)elem).getJobletNode().getUniqueName();
      for (      INode node : jobletnodeList) {
        if (!node.getUniqueName().startsWith(jobletUniName)) {
          nodeList.remove(node);
        }
      }
    }
    List<String> componentDisplayNames=new ArrayList<String>();
    List<String> componentUniqueNames=new ArrayList<String>();
    for (    INode node : nodeList) {
      String uniqueName=node.getUniqueName();
      if (uniqueName.equals(currentNode.getUniqueName())) {
        continue;
      }
      String displayName=(String)node.getElementParameter("String_Node_Str").getValue();
      if (displayName == null) {
        displayName=uniqueName + "String_Node_Str" + displayName;
      }
      if (displayName.indexOf("String_Node_Str") != -1) {
        displayName=displayName.replaceAll("String_Node_Str",uniqueName);
      }
 else {
        displayName=uniqueName + "String_Node_Str" + displayName;
      }
{
        componentUniqueNames.add(uniqueName);
        componentDisplayNames.add(displayName);
      }
    }
    String[] componentNameList=componentDisplayNames.toArray(new String[0]);
    String[] componentValueList=componentUniqueNames.toArray(new String[0]);
    param.setListItemsDisplayName(componentNameList);
    param.setListItemsValue(componentValueList);
    Object value=param.getValue();
    if (!componentUniqueNames.contains(value)) {
      String newValue=null;
      if ((componentUniqueNames.size() > 0)) {
        if (value == null || value.equals("String_Node_Str")) {
          elem.setPropertyValue(getParameterName(param),componentValueList[0]);
          if (elem instanceof Node) {
            Node node=(Node)elem;
            node.checkAndRefreshNode();
            ((IProcess2)node.getProcess()).setProcessModified(true);
          }
 else           if (elem instanceof Connection) {
            ((IProcess2)((Connection)elem).getSource().getProcess()).setProcessModified(true);
          }
        }
 else {
          newValue=componentValueList[0];
        }
      }
 else {
        newValue="String_Node_Str";
      }
      if (!("String_Node_Str".equals(newValue)) && newValue != null) {
        IEditorPart part=PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
        if (part instanceof AbstractMultiPageTalendEditor) {
          AbstractTalendEditor te=((AbstractMultiPageTalendEditor)part).getTalendEditor();
          CommandStack cmdStack=(CommandStack)te.getAdapter(CommandStack.class);
          cmdStack.execute(new PropertyChangeCommand(elem,getParameterName(param),newValue));
        }
      }
    }
  }
}