In bitcoin-cli getpeerinf call what does "-1" mean as a "synced_headers" or "synced_blocks" value?

Question

Sometimes I see this in getpeerinfo:
"synced_headers": -1,
"synced_blocks": -1,
sometimes it's only synced blocks at -1.
What does that mean?

darosior · Answer

It means you either have no headers, no block, or both known to be (*) in common with this peer.
From the help:
$ bitcoin-cli help getpeerinfo
....
    "synced_headers" : n,          (numeric) The last header we have in common with this peer
    "synced_blocks" : n,           (numeric) The last block we have in common with this peer

(*) As Pieter cleared in the comment it doesn't mean you aren't on the same chain, just that the peer didn't announce any block to you yet.

In bitcoin-cli getpeerinf call what does "-1" mean as a "synced_headers" or "synced_blocks" value?

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