fix exports from zero height (#785) #4116

	---
	name: build

	on:
	push:
	paths:
	- '**.go'
	- 'go.sum'

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest
	name: build
	steps:
	- uses: actions/checkout@v3
	- name: Setup go
	uses: actions/setup-go@v3
	with:
	go-version: 1.20.0
	- run: go build ./...

	test:
	runs-on: ubuntu-latest
	name: test
	steps:
	- name: Install Go
	uses: actions/setup-go@v3
	with:
	go-version: 1.20.0
	- name: Checkout code
	uses: actions/checkout@v3
	- name: Test
	run: go test ./...

	tidy:
	runs-on: ubuntu-latest
	name: tidy
	steps:
	- uses: actions/checkout@v3
	- name: Setup go
	uses: actions/setup-go@v3
	with:
	go-version: 1.20.0
	- run: \|
	go mod tidy
	CHANGES_IN_REPO=$(git status --porcelain)
	if [[ -n "$CHANGES_IN_REPO" ]]; then
	echo "Repository is dirty. Showing 'git status' and 'git --no-pager diff' for debugging now:"
	git status && git --no-pager diff
	exit 1
	fi

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