test case for btcsuite/btcd#1622
Cloning/trying to setup yields:
go: github.com/btcsuite/[email protected] requires github.com/btcsuite/btcd/[email protected]: reading github.com/btcsuite/btcd/btcec/btcec/go.mod at revision btcec/v0.1.0: unknown revision btcec/v0.1.0