docker stats: fix 'panic: close of closed channel'
@@ -66,8 +66,11 @@ func (p *Publisher) SubscribeTopicWithBuffer(topic topicFunc, buffer int) chan i
// Evict removes the specified subscriber from receiving any more messages.
func (p *Publisher) Evict(sub chan interface{}) {
p.m.Lock()
+ _, exists := p.subscribers[sub]
+ if exists {
delete(p.subscribers, sub)
close(sub)
+ }
p.m.Unlock()
}
