lotus-miner proving check 0 - ERROR: rg is nil

[ghost]

Checklist

• This is not a security-related bug/issue. If it is, please follow please follow the security policy.
• This is not a question or a support request. If you have any lotus related questions, please ask in the lotus forum.
• This is not a new feature request. If it is, please file a feature request instead.
• This is not an enhancement request. If it is, please file a improvement suggestion instead.
• I have searched on the issue tracker and the lotus forum, and there is no existing related issue or discussion.
• I am running the Latest release, or the most recent RC(release canadiate) for the upcoming release or the dev branch(master), or have an issue updating to any of these.
• I did not make any code changes to lotus.

Lotus component

• lotus daemon - chain sync
• lotus miner - mining and block production
• lotus miner/worker - sealing
• lotus miner - proving(WindowPoSt)
• lotus miner/market - storage deal
• lotus miner/market - retrieval deal
• lotus miner/market - data transfer
• lotus client
• lotus JSON-RPC API
• lotus message management (mpool)
• Other

Lotus Version

lotus-miner version 1.18.0+mainnet+git.bd10bdf99

Describe the Bug

lotus-miner proving check 0 

ERROR: rg is nil

command fails with unclear error message

lotus-miner proving compute wondow-post 0 works fine

Took 2m45.159382168s
[{"Deadline":0,"Partitions":[{"Index":0,"Skipped":[0]}],"Proofs":[{"PoStProof":8,"ProofBytes":"p0x7Qh9ROI5/jhzQQuwTD849yLU3A8n3QScZdTG+9p47e6hDQAOJwxEP0rPP5vnTtu40bUAXhRr40V3ehlu8DB2v/tMKUxc5mxY3J2wtHUztWDFog7Bh2JKwq24Snz36AWRJPrO2VUwhwOXgUc+upx/3qcQHUMX3T9dWIbGszw/XRLeTPIDl2BFuf/I1eP9RpgVVtJcOShONS0P1JCK9PZs7FLSln4FaXKQFgE14dZAe9PYUQ9/AnccE9nk4e6iN"}],"ChainCommitEpoch":0,"ChainCommitRand":null}]

Logging Information

tell me what you need and we get it

Repo Steps

1. Run '...'
2. Do '...'
3. See error '...'
   ...

[rjan90]

Hey @f8-fil-ops! Thank you so much for the issue report. This issue has been fixed with this PR: #9643, which is included in Lotus v1.19.0 and higher