Program: 120880
Project: 120880
Buggy source:
@Override public ExecutionResult execute(Item item){
  ProcessType processType=getProcessType(item);
  if (getProject().getLanguage() != ECodeLanguage.JAVA || processType == null) {
    return ExecutionResult.NOTHING_TO_DO;
  }
  String[] componentsName=new String[]{"String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str"};
  IComponentConversion changeJDBCDriverJarType=new IComponentConversion(){
    public void transform(    NodeType node){
      ElementParameterType customModule=ComponentUtilities.getNodeProperty(node,"String_Node_Str");
      if (customModule == null) {
        customModule=ComponentUtilities.getNodeProperty(node,"String_Node_Str");
      }
      if (customModule != null) {
        String customModuleName=customModule.getValue();
        if (customModuleName != null) {
          if (!customModuleName.startsWith("String_Node_Str")) {
            customModuleName="String_Node_Str" + customModuleName;
          }
          if (!customModuleName.endsWith("String_Node_Str")) {
            customModuleName=customModuleName + "String_Node_Str";
          }
          customModule.setValue(customModuleName);
        }
      }
    }
  }
;
  for (  String name : componentsName) {
    IComponentFilter filter=new NameComponentFilter(name);
    try {
      ModifyComponentsAction.searchAndModify(item,processType,filter,Arrays.<IComponentConversion>asList(changeJDBCDriverJarType));
    }
 catch (    PersistenceException e) {
      ExceptionHandler.process(e);
      return ExecutionResult.FAILURE;
    }
  }
  return ExecutionResult.SUCCESS_WITH_ALERT;
}

Fixed version (ground truth):
@Override public ExecutionResult execute(Item item){
  ProcessType processType=getProcessType(item);
  if (getProject().getLanguage() != ECodeLanguage.JAVA || processType == null) {
    return ExecutionResult.NOTHING_TO_DO;
  }
  String[] componentsName=new String[]{"String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str","String_Node_Str"};
  IComponentConversion changeJDBCDriverJarType=new IComponentConversion(){
    public void transform(    NodeType node){
      ElementParameterType module=ComponentUtilities.getNodeProperty(node,"String_Node_Str");
      if (module != null && "String_Node_Str".equals(module.getValue())) {
        ElementParameterType customModule=ComponentUtilities.getNodeProperty(node,"String_Node_Str");
        if (customModule == null) {
          customModule=ComponentUtilities.getNodeProperty(node,"String_Node_Str");
        }
        if (customModule != null) {
          String customModuleName=customModule.getValue();
          if (customModuleName != null) {
            if (!customModuleName.startsWith("String_Node_Str")) {
              customModuleName="String_Node_Str" + customModuleName;
            }
            if (!customModuleName.endsWith("String_Node_Str")) {
              customModuleName=customModuleName + "String_Node_Str";
            }
            customModule.setValue(customModuleName);
          }
        }
      }
    }
  }
;
  for (  String name : componentsName) {
    IComponentFilter filter=new NameComponentFilter(name);
    try {
      ModifyComponentsAction.searchAndModify(item,processType,filter,Arrays.<IComponentConversion>asList(changeJDBCDriverJarType));
    }
 catch (    PersistenceException e) {
      ExceptionHandler.process(e);
      return ExecutionResult.FAILURE;
    }
  }
  return ExecutionResult.SUCCESS_WITH_ALERT;
}