NewHeaderBlock does not want to send message

[lslavkov]

What happened

When running a script to send a text through slack.NewHeaderBlock it displayed that runtime error: invalid memory address or nil pointer dereference which referred to the block_header.go:34

Expected behavior

Sended a block header formatting to the Slack

Steps to reproduce

reproducible code

headerText := slack.NewTextBlockObject("mrkdwn", "You have a new request:\n*<fakeLink.toEmployeeProfile.com|Fred Enriquez - New device request>*", false, false)
headerSection := slack.NewHeaderBlock(headerText, nil)
blocksExample := []slack.Block{
	headerSection,
}

token := os.Getenv("SLACK_AUTH_TOKEN")
channelId := os.Getenv("SLACK_CHANNEL_ID")
client := slack.New(token, slack.OptionDebug(true))

_, block, err := client.PostMessage(channelId, slack.MsgOptionBlocks(blocksExample...))

fmt.Printf("Block: %s\n", block)

if err != nil {
	panic(err)
}

Versions

• Go: v1.20.8 linux/amd64
• slack-go/slack: v0.12.3