A bug for double called IncrCounterWithLabels Method in PrometheusSink

[lockTP]

p.mu.Lock() defer p.mu.Unlock() key, hash := p.flattenKey(parts, labels) **g, ok := p.counters[hash]** if !ok { g = prometheus.NewCounter(prometheus.CounterOpts{ Name: key, Help: key, ConstLabels: prometheusLabels(labels), }) prometheus.MustRegister(g) **p.counters[key] = g** } g.Add(float64(val))

When finding the counter, the method use "hash" as the key to search the counter. However, it put the counter into the map with "key", which make bug in double calling for IncrCounterWithLabels or any other XXXWithLabels.