Panicked at 'nonce will return Some when given BlockId::Latest.

[pdlibsh]

For questions please use https://discord.io/openethereum, issues are for bugs and feature requests.

Before filing a new issue, please provide the following information.

• OpenEthereum version (>=3.1.0): 3.1.0
• Operating system: Linux
• Installation: one-line installer
• Fully synchronized: no / yes
• Network: ethereum
• Restarted: no

Your issue description goes here below. Try to include actual vs. expected behavior and steps to reproduce the issue.

The expected behavior is for my Ethereum node to be fastly synchronized with the Mainet, therefore the local block height is expected to equal that of the Mainet. The fast synchronization went well and narrowed down the block difference from more than 30000 to 289. However, the following exception occurred and halted synchronization when the block difference was at 289. I have no clue what indeed went wrong. Could any expert kindly shed light on this 'panic' situation?

2021-01-03 08:35:55 Starting
OpenEthereum/v3.1.0-stable-2072341-20201102/x86_64-linux-gnu/rustc1.47.0
2021-01-03 08:35:55 Keys path /coins/eth/datas/keys/ethereum
2021-01-03 08:35:55 DB path /coins/eth/datas/chains/ethereum/db/906a34e69aec8c0d
2021-01-03 08:35:55 State DB configuration: fast
2021-01-03 08:35:55 Operating mode: active
2021-01-03 08:35:55 Configured for Ethereum using Ethash engine
2021-01-03 08:35:55 Listening for new connections on 127.0.0.1:8546.
2021-01-03 08:35:56 Updated conversion rate to Ξ1 = US$776.81 (6130076.5 wei/gas)
2021-01-03 08:36:00 Public node URL: enode://d48c906920de2c8383838964c44c5add8ecfd7c0775b97112ba1d098d101d041041379166b66929b46395413a7d3bdadedaaea4c9aecaab86a2a2fb1b38c882e@172.29.254.94:30303
2021-01-03 08:36:05 Syncing #11575845 0x268a…3465 0.00 blk/s 0.0 tx/s 0.0 Mgas/s 0+ 0 Qed #11575844 19/50 peers 469 KiB chain 0 bytes queue RPC: 0 conn, 0 req/s, 35 µs
2021-01-03 08:36:10 Syncing #11575845 0x268a…3465 0.00 blk/s 0.0 tx/s 0.0 Mgas/s 0+ 0 Qed #11575944 19/50 peers 469 KiB chain 0 bytes queue RPC: 0 conn, 0 req/s, 35 µs
2021-01-03 08:36:13 Panic occured, see stderr for details

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Thread 'IO Worker #2' panicked at 'nonce will return Some when given BlockId::Latest. nonce was given BlockId::Latest. Therefore nonce has returned Some; qed', ethcore/src/client/traits.rs:93

[rakita]

Duplicate #69