add internal error logging and update comments for `gclient.RequestVar` #2997

# to view logs

	# Tencent is pleased to support the open source community by making Polaris available.
	#
	# Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
	#
	# Licensed under the BSD 3-Clause License (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# https://opensource.org/licenses/BSD-3-Clause
	#
	# 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.

	name: GolangCI-Lint
	on:
	push:
	branches:
	- master
	- develop
	- personal/**
	- feature/**
	- enhance/**
	- fix/**
	pull_request:
	branches:
	- master
	- develop
	- personal/**
	- feature/**
	- enhance/**
	- fix/**

	jobs:
	golangci:
	strategy:
	matrix:
	go-version: [ '1.18','1.19','1.20','1.21.4' ]
	name: golangci-lint
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Setup Golang ${{ matrix.go-version }}
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}
	- name: golangci-lint
	uses: golangci/golangci-lint-action@v3
	with:
	# Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
	version: v1.52.2
	args: --timeout 3m0s

Provide feedback