Program: 188332
Project: 188332
Buggy source:
@UiHandler("String_Node_Str") void buttonRenameHandler(ClickEvent e){
  if (!ClientSelectedItemsUtils.isEmpty(getSelected()) && getSelected() instanceof SelectedItemsList) {
    SelectedItemsList<TransferredResource> resourceList=(SelectedItemsList<TransferredResource>)getSelected();
    BrowserService.Util.getInstance().retrieve(TransferredResource.class.getName(),resourceList.getIds().get(0),Arrays.asList(RodaConstants.TRANSFERRED_RESOURCE_ID,RodaConstants.TRANSFERRED_RESOURCE_NAME),new AsyncCallback<TransferredResource>(){
      @Override public void onFailure(      Throwable caught){
        Toast.showInfo(messages.dialogFailure(),messages.renameSIPFailed());
      }
      @Override public void onSuccess(      final TransferredResource resultResource){
        Dialogs.showPromptDialog(messages.renameTransferredResourcesDialogTitle(),null,resultResource.getName(),RegExp.compile("String_Node_Str"),messages.cancelButton(),messages.confirmButton(),new AsyncCallback<String>(){
          @Override public void onFailure(          Throwable caught){
          }
          @Override public void onSuccess(          String result){
            BrowserService.Util.getInstance().renameTransferredResource(resultResource.getId(),result,new AsyncCallback<String>(){
              @Override public void onFailure(              Throwable caught){
                Toast.showInfo(messages.dialogFailure(),messages.renameSIPFailed());
              }
              @Override public void onSuccess(              String result){
                Toast.showInfo(messages.dialogSuccess(),messages.renameSIPSuccessful());
                HistoryUtils.newHistory(IngestTransfer.RESOLVER,result);
              }
            }
);
          }
        }
);
      }
    }
);
  }
 else {
    return;
  }
}

Fixed version (ground truth):
@UiHandler("String_Node_Str") void buttonRenameHandler(ClickEvent e){
  if (!ClientSelectedItemsUtils.isEmpty(getSelected()) && getSelected() instanceof SelectedItemsList) {
    SelectedItemsList<TransferredResource> resourceList=(SelectedItemsList<TransferredResource>)getSelected();
    BrowserService.Util.getInstance().retrieve(TransferredResource.class.getName(),resourceList.getIds().get(0),Arrays.asList(RodaConstants.TRANSFERRED_RESOURCE_ID,RodaConstants.TRANSFERRED_RESOURCE_NAME),new AsyncCallback<TransferredResource>(){
      @Override public void onFailure(      Throwable caught){
        Toast.showInfo(messages.dialogFailure(),messages.renameSIPFailed());
      }
      @Override public void onSuccess(      final TransferredResource resultResource){
        Dialogs.showPromptDialog(messages.renameTransferredResourcesDialogTitle(),null,resultResource.getName(),RegExp.compile("String_Node_Str"),messages.cancelButton(),messages.confirmButton(),new AsyncCallback<String>(){
          @Override public void onFailure(          Throwable caught){
          }
          @Override public void onSuccess(          String result){
            BrowserService.Util.getInstance().renameTransferredResource(resultResource.getUUID(),result,new AsyncCallback<String>(){
              @Override public void onFailure(              Throwable caught){
                Toast.showInfo(messages.dialogFailure(),messages.renameSIPFailed());
              }
              @Override public void onSuccess(              String result){
                Toast.showInfo(messages.dialogSuccess(),messages.renameSIPSuccessful());
                HistoryUtils.newHistory(IngestTransfer.RESOLVER,result);
              }
            }
);
          }
        }
);
      }
    }
);
  }
 else {
    return;
  }
}