panic if starting lnd while bitcoind is syncing

[halseth]

Background

Started bitcoind + lnd, and since bitcoind had been offline for a while it took some time to catch up on blocks. When it was done syncing lnd crashed.

Your environment

• version of lnd: recent master: 0.11.99-beta commit=v0.11.0-beta-534-g7e298f143425337448f95019234b22849d64aca3, build=production, logging=default, debuglevel=debug
• which operating system (uname -a on *Nix): Mac OS Catalina
• version of btcd, bitcoind, or other backend: bitcoind v0.20.1.0-g7ff64311bee570874c4f0dfa18f518552188df08
• any other relevant environment details

Steps to reproduce

Start bitcoind that is behind tip, start lnd.

Expected behaviour

lnd should start up normally after bitcoind finishes sync.

Actual behaviour

lnd/btcwallet crashes:

156986 2020-11-28 11:03:51.462 [INF] LTND: Version: 0.11.99-beta commit=v0.11.0-beta-534-g7e298f143425337448f95019234b22849d64aca3, build=production, logging=default, debuglevel=debug
156987 2020-11-28 11:03:51.462 [INF] LTND: Active chain: Bitcoin (network=mainnet)
156988 2020-11-28 11:03:51.463 [INF] LTND: Opening the main database, this might take a few minutes...
156989 2020-11-28 11:03:51.463 [INF] LTND: Opening bbolt database, sync_freelist=false, auto_compact=true
...
156995 2020-11-28 11:03:55.149 [INF] LTND: Waiting for wallet encryption password. Use `lncli create` to create a wallet, `lncli unlock` to unlock an existing wallet, or `lncli changepassword` to change the password of an existing wallet and unlock it.
156996 2020-11-28 11:04:05.438 [INF] LNWL: Opened wallet
156997 2020-11-28 11:04:05.543 [INF] CHRE: Primary chain is set to: bitcoin
156998 2020-11-28 11:04:09.167 [INF] CHRE: Initializing bitcoind backed fee estimator in CONSERVATIVE mode
156999 2020-11-28 11:04:09.167 [INF] LNWL: Started listening for bitcoind block notifications via ZMQ on 127.0.0.1:28332
157000 2020-11-28 11:04:09.167 [INF] LNWL: Started listening for bitcoind transaction notifications via ZMQ on 127.0.0.1:28333
157001 2020-11-28 11:04:09.173 [DBG] LNWL: Using minimum fee rate of 253 sat/kw
157002 2020-11-28 11:04:10.584 [INF] LNWL: The wallet has been unlocked without a time limit
157003 2020-11-28 11:04:17.492 [INF] CHRE: LightningWallet opened
157004 2020-11-28 11:04:17.493 [DBG] LNWL: Birthday block has already been verified: height=513668, hash=00000000000000000016892502c7d450de3415d53204707ae99c4fcafdf66c77
157005 2020-11-28 11:04:17.493 [DBG] LNWL: Waiting for chain backend to sync to tip
…
2020-11-28 11:04:22.694 [INF] LTND: Waiting for chain backend to finish sync, start_height=658913
2020-11-28 11:06:13.259 [DBG] LNWL: Chain backend synced to tip!
panic: Unable to synchronize wallet to chain: -8: Block height out of range

goroutine 122 [running]:
github.com/btcsuite/btcwallet/wallet.(*Wallet).handleChainNotifications(0xc000120140)
        /Users/johan/go/pkg/mod/github.com/btcsuite/btcwallet@v0.11.1-0.20201104022105-a6f3888450e4/wallet/chainntfns.go:117 +0x1253
created by github.com/btcsuite/btcwallet/wallet.(*Wallet).SynchronizeRPC
        /Users/johan/go/pkg/mod/github.com/btcsuite/btcwallet@v0.11.1-0.20201104022105-a6f3888450e4/wallet/wallet.go:201 +0x1f4

[halseth]

panicking because we cannot sync chain: https://github.com/btcsuite/btcwallet/blob/master/wallet/chainntfns.go#L117

[sangaman]

I believe this would be fixed by btcsuite/btcwallet#677. Never mind, this looks like a separate issue.

[Roasbeef]

Closing this for now as seems this hasn't popped up in a while and may already be addressed.

[ellemouton]

Looks like this popped up again now: #7449