Program: 120018
Project: 120018
Buggy source:
@Override public void run(){
  String path=null;
  if (GlobalServiceRegister.getDefault().isServiceRegistered(IComponentsLocalProviderService.class)) {
    IComponentsLocalProviderService service=(IComponentsLocalProviderService)GlobalServiceRegister.getDefault().getService(IComponentsLocalProviderService.class);
    if (service != null) {
      path=service.getPreferenceStore().getString("String_Node_Str");
    }
  }
  if (path == null || path.length() == 0) {
    new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,Messages.getString("String_Node_Str"),MessageDialog.ERROR,new String[]{Messages.getString("String_Node_Str")},0).open();
    return;
  }
  File targetFile=new File(path);
  if (!targetFile.exists()) {
    new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,Messages.getString("String_Node_Str"),MessageDialog.ERROR,new String[]{Messages.getString("String_Node_Str")},0).open();
    return;
  }
  String projectURL=ComponentDesigenerPlugin.getDefault().getPreferenceStore().getString(PluginConstant.PROJECT_URL);
  File source=new File(projectURL);
  List<String> invalidXMLs=new ArrayList();
  for (  IFolder selectedFolder : selectedFolderList) {
    List<String> result=checkComponentXMLinFolder(selectedFolder.getRawLocation().toString());
    invalidXMLs.addAll(result);
  }
  if (invalidXMLs.size() == 0) {
    if (!targetFile.equals(source)) {
      for (      IFolder selectedFolder : selectedFolderList) {
        File sourceFile=selectedFolder.getRawLocation().toFile();
        String sourceComponentFolder=sourceFile.getAbsolutePath();
        String targetComponentFolder=targetFile.getAbsolutePath() + File.separator + sourceFile.getName();
        FileCopy.copyComponentFolder(sourceComponentFolder,targetComponentFolder,true);
      }
    }
    IComponentsFactory components=ComponentsFactoryProvider.getInstance();
    List<IComponent> comList=components.getCustomComponents();
    for (    IComponent com : comList) {
      if (com.getImageRegistry() != null) {
        com.getImageRegistry().clear();
      }
    }
    MessageDialog warningMessageDialog=new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,Messages.getString("String_Node_Str"),MessageDialog.INFORMATION,new String[]{Messages.getString("String_Node_Str")},0);
    warningMessageDialog.open();
    CorePlugin.getDefault().getCodeGeneratorService().refreshTemplates();
  }
 else {
    StringBuffer sbuffer=new StringBuffer();
    for (    String invalidXML : invalidXMLs) {
      sbuffer.append(invalidXML).append("String_Node_Str");
    }
    String waringInfo=Messages.getString("String_Node_Str") + sbuffer.toString();
    MessageDialog warningMessageDialog=new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,waringInfo,MessageDialog.WARNING,new String[]{Messages.getString("String_Node_Str")},0);
    warningMessageDialog.open();
  }
}

Fixed version (ground truth):
@Override public void run(){
  IWorkbenchWindow activeWorkbenchWindow=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  PerspectiveBarManager barManager=null;
  if (activeWorkbenchWindow != null) {
    barManager=((WorkbenchWindow)activeWorkbenchWindow).getPerspectiveBar();
    if (barManager != null) {
      barManager.getControl().setEnabled(false);
    }
  }
  String path=null;
  if (GlobalServiceRegister.getDefault().isServiceRegistered(IComponentsLocalProviderService.class)) {
    IComponentsLocalProviderService service=(IComponentsLocalProviderService)GlobalServiceRegister.getDefault().getService(IComponentsLocalProviderService.class);
    if (service != null) {
      path=service.getPreferenceStore().getString("String_Node_Str");
    }
  }
  if (path == null || path.length() == 0) {
    new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,Messages.getString("String_Node_Str"),MessageDialog.ERROR,new String[]{Messages.getString("String_Node_Str")},0).open();
    return;
  }
  File targetFile=new File(path);
  if (!targetFile.exists()) {
    new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,Messages.getString("String_Node_Str"),MessageDialog.ERROR,new String[]{Messages.getString("String_Node_Str")},0).open();
    return;
  }
  String projectURL=ComponentDesigenerPlugin.getDefault().getPreferenceStore().getString(PluginConstant.PROJECT_URL);
  File source=new File(projectURL);
  List<String> invalidXMLs=new ArrayList();
  for (  IFolder selectedFolder : selectedFolderList) {
    List<String> result=checkComponentXMLinFolder(selectedFolder.getRawLocation().toString());
    invalidXMLs.addAll(result);
  }
  if (invalidXMLs.size() == 0) {
    if (!targetFile.equals(source)) {
      for (      IFolder selectedFolder : selectedFolderList) {
        File sourceFile=selectedFolder.getRawLocation().toFile();
        String sourceComponentFolder=sourceFile.getAbsolutePath();
        String targetComponentFolder=targetFile.getAbsolutePath() + File.separator + sourceFile.getName();
        FileCopy.copyComponentFolder(sourceComponentFolder,targetComponentFolder,true);
      }
    }
    IComponentsFactory components=ComponentsFactoryProvider.getInstance();
    List<IComponent> comList=components.getCustomComponents();
    for (    IComponent com : comList) {
      if (com.getImageRegistry() != null) {
        com.getImageRegistry().clear();
      }
    }
    MessageDialog warningMessageDialog=new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,Messages.getString("String_Node_Str"),MessageDialog.INFORMATION,new String[]{Messages.getString("String_Node_Str")},0);
    warningMessageDialog.open();
    CorePlugin.getDefault().getCodeGeneratorService().refreshTemplates();
  }
 else {
    StringBuffer sbuffer=new StringBuffer();
    for (    String invalidXML : invalidXMLs) {
      sbuffer.append(invalidXML).append("String_Node_Str");
    }
    String waringInfo=Messages.getString("String_Node_Str") + sbuffer.toString();
    MessageDialog warningMessageDialog=new MessageDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),Messages.getString("String_Node_Str"),null,waringInfo,MessageDialog.WARNING,new String[]{Messages.getString("String_Node_Str")},0);
    warningMessageDialog.open();
  }
}