behzad nouri 8d980f07ba uses Option<Slot> for SlotMeta.parent_slot (#21808) ... SlotMeta.parent_slot for the head of a detached chain of slots is unknown and that is indicated by u64::MAX which lacks type-safety: https://github.com/solana-labs/solana/blob/6c108c8fc/ledger/src/blockstore_meta.rs#L203-L205 The commit changes the type to Option<Slot>. Backward compatibility is maintained by customizing serde serialize/deserialize implementations.		2021-12-14 18:57:11 +00:00
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local_cluster.rs	uses Option<Slot> for SlotMeta.parent_slot (#21808)	2021-12-14 18:57:11 +00:00