Fix "No object to concat" Bug and support Some corner cases #1482

	# Copyright (c) 2021-2024, NVIDIA CORPORATION.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	# A workflow to check if PR got sign-off
	name: signoff check

	on:
	pull_request_target:
	types: [opened, synchronize, reopened]

	jobs:
	signoff-check:
	runs-on: ubuntu-latest
	steps:
	- name: signoff
	uses: NVIDIA/spark-rapids-common/signoff-check@main
	with:
	owner: ${{ github.repository_owner }}
	repo: spark-rapids-ml
	pull_number: ${{ github.event.number }}
	token: ${{ secrets.GITHUB_TOKEN }}

Provide feedback