Method add

server/recent_errors.go:49–60

(e RecentError)

}

func (r *recentErrorRing) add(e RecentError) {
	if r == nil {
		return
	}
	r.mu.Lock()
	r.buf[r.next] = e
	r.next = (r.next + 1) % len(r.buf)
	if r.n < len(r.buf) {
		r.n++
	}
	r.mu.Unlock()
}

// snapshot returns up to limit most-recent errors, newest first (limit <= 0
// returns all retained).