Error with block built when epoch expired

[badkk]

Step to reproduce:

1. Start normally with crust --dev;
2. Stop normally and wait more than 1 epoch(alphanet is 1m);
3. Start again;

Error detail:

2020-01-10 10:06:55 Crust ALPHA Node
2020-01-10 10:06:55   version 0.0.1-211c7a5-x86_64-macos
2020-01-10 10:06:55   by crustio, 2019, 2020
2020-01-10 10:06:55 Chain specification: Local Testnet
2020-01-10 10:06:55 Node name: Bob
2020-01-10 10:06:55 Roles: AUTHORITY
2020-01-10 10:06:55 Highest known block at #31
2020-01-10 10:06:55 Using default protocol ID "sup" because none is configured in the chain specs
2020-01-10 10:06:55 Local node identity is: QmRVb12fiybGjStNNHA8318SQFPRV9PHwQkPWkS7DGReZf
2020-01-10 10:06:55 Starting BABE Authorship worker
2020-01-10 10:06:55 Unable to bind grafana data source server to 127.0.0.1:9955. Trying random port.
2020-01-10 10:06:55 Grafana data source server started at 127.0.0.1:0
2020-01-10 10:06:56 Discovered new external address for our node: /ip4/192.168.50.56/tcp/30334/p2p/QmRVb12fiybGjStNNHA8318SQFPRV9PHwQkPWkS7DGReZf
2020-01-10 10:07:00 Idle (0 peers), best: #31 (0xb60e…518c), finalized #30 (0xf108…1d38), ⬇ 0.4kiB/s ⬆ 0.4kiB/s
2020-01-10 10:07:05 Idle (1 peers), best: #31 (0xb60e…518c), finalized #30 (0xf108…1d38), ⬇ 1.2kiB/s ⬆ 1.1kiB/s
2020-01-10 10:07:10 Idle (1 peers), best: #31 (0xb60e…518c), finalized #30 (0xf108…1d38), ⬇ 1.0kiB/s ⬆ 1.0kiB/s
2020-01-10 10:07:12 Starting consensus session on top of parent 0xb60effdb93f2773b9ade15bbb152b3402f68629ff565ebf0a8c40c07a6cc518c
2020-01-10 10:07:12 Prepared block for proposing at 32 [hash: 0x25cfb1f6d34ee9a34c7eb5d581d0e77c58af86c39d1c100e52fffcb6a64148e5; parent_hash: 0xb60e…518c; extrinsics: [0xca73…d404]]
2020-01-10 10:07:12 Pre-sealed block for proposal at 32. Hash now 0xec898038a9b9312b6dacc3a0e636c272844ae58cacdfb0f7b9aed9d380201d09, previously 0x25cfb1f6d34ee9a34c7eb5d581d0e77c58af86c39d1c100e52fffcb6a64148e5.
2020-01-10 10:07:12 Error with block built on 0xb60effdb93f2773b9ade15bbb152b3402f68629ff565ebf0a8c40c07a6cc518c: ClientImport("Expected epoch change to happen at 0xec898038a9b9312b6dacc3a0e636c272844ae58cacdfb0f7b9aed9d380201d09, s263103672")

[badkk]

This is a known issue, and it needs to be followed by the next substrate release

[badkk]

This is fixed by the latest substrate