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eth/filter: check nil pointer when unsubscribe

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This commit is contained in:
rjl493456442 2018-05-04 20:12:32 +08:00
parent 16f3c31773
commit cf133fed7d
1 changed files with 18 additions and 6 deletions
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24
eth/filters/filter_system.go
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@ -428,12 +428,24 @@ func (es *EventSystem) eventLoop() {
chainEvSub = es.backend.SubscribeChainEvent(chainEvCh)
)
// Unsubscribe all events
defer sub.Unsubscribe()
defer txSub.Unsubscribe()
defer rmLogsSub.Unsubscribe()
defer logsSub.Unsubscribe()
defer chainEvSub.Unsubscribe()
defer func() {
// Unsubscribe all events
if sub != nil {
sub.Unsubscribe()
}
if txSub != nil {
txSub.Unsubscribe()
}
if rmLogsSub != nil {
rmLogsSub.Unsubscribe()
}
if logsSub != nil {
logsSub.Unsubscribe()
}
if chainEvSub != nil {
chainEvSub.Unsubscribe()
}
}()
for i := UnknownSubscription; i < LastIndexSubscription; i++ {
index[i] = make(map[rpc.ID]*subscription)