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p2p/discover: fix out-of-bounds issue

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Péter Szilágyi 2018-02-13 20:59:43 +02:00
parent 88f2839da4
commit 20797348ca
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1 changed files with 1 additions and 1 deletions
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p2p/discover/table.go
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@ -763,7 +763,7 @@ func (tab *Table) addReplacement(b *bucket, n *Node) {
// last entry in the bucket. If 'last' isn't the last entry, it has either been replaced
// with someone else or became active.
func (tab *Table) replace(b *bucket, last *Node) *Node {
if len(b.entries) >= 0 && b.entries[len(b.entries)-1].ID != last.ID {
if len(b.entries) == 0 || b.entries[len(b.entries)-1].ID != last.ID {
// Entry has moved, don't replace it.
return nil
}