goSum.status[modSum{mod, h}] = st
	}
	goSum.mu.Unlock()

	if done {
		return nil
	}

	// Not listed, so we want to add them.
	// Consult checksum database if appropriate.
	if useSumDB(mod) {
		// Calls base.Fatalf if mismatch detected.
		if err := checkSumDB(mod, h); err != nil {
			return err
		}
	}

	// Add mod+h to go.sum, if it hasn't appeared already.
	if inited {