"lotus-storage-miner run" : panic: runtime error: invalid memory address or nil pointer dereference

INFO:
lotus-storage-miner version 0.4.0+git.fbfe57cd
(most recent version as of 2020-06-28)

ISSUE:

After starting ‘lotus-storage-miner run’ for a short while, it exits with the following error:

    2020-06-28T20:34:46.199-0700    INFO    build   go-paramfetch@v0.0.2-0.20200605171344-fcac609550ca/paramfetch.go:128    Parameter file /var/tmp/filecoin-proof-parameters/v27-proof-of-spacetime-fa
    llback-merkletree-poseidon_hasher-8-8-0-559e581f022bb4e4ec6e719e563bf0e026ad6de42e56c18714a2c692b1b88d7e.params is ok
    2020-06-28T20:34:48.821-0700    INFO    basichost       basic/natmgr.go:96      DiscoverNAT error:no NAT found
    2020-06-28T20:41:04.092-0700    INFO    build   go-paramfetch@v0.0.2-0.20200605171344-fcac609550ca/paramfetch.go:128    Parameter file /var/tmp/filecoin-proof-parameters/v27-stacked-proof-of-replication-merkletree-poseidon_hasher-8-8-0-sha256_hasher-82a357d2f2ca81dc61bb45f4a762807aedee1b0a53fd6c4e77b46a01bfef7820.params is ok
    2020-06-28T20:41:33.938-0700    INFO    build   go-paramfetch@v0.0.2-0.20200605171344-fcac609550ca/paramfetch.go:128    Parameter file /var/tmp/filecoin-proof-parameters/v27-proof-of-spacetime-fallback-merkletree-poseidon_hasher-8-8-0-0377ded656c6f524f1618760bffe4e0a1c51d5a70c4509eedae8a27555733edc.params is ok
    2020-06-28T20:41:33.938-0700    INFO    build   go-paramfetch@v0.0.2-0.20200605171344-fcac609550ca/paramfetch.go:147    parameter and key-fetching complete
    2020-06-28T20:41:33.940-0700    WARN    modules modules/core.go:47      Generating new API secret
    2020-06-28T20:41:33.945-0700    INFO    stores  stores/index.go:137     New sector storage: b7d3421b-e02a-4bcc-950e-181cf5055242
    2020-06-28T20:41:34.901-0700    WARN    storedask       storedask/storedask.go:121      no previous ask found, miner will not accept deals until a price is set
    2020-06-28T20:41:34.921-0700    INFO    storageminer    storage/miner.go:130    starting up miner t0117915, worker addr t3wovvjse37tn6kwge6vuvjcpejpndoj2dttdgxnx7nlqntvvax4zq4cnxwspc6mzbdccijjhswdlnjfmumnfa
    2020-06-28T20:41:34.922-0700    INFO    storageminer    storage/wdpost_sched.go:200     at 35091, doPost for P 33436, dd 17
    panic: runtime error: invalid memory address or nil pointer dereference
    [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x11723d2]

    goroutine 617 [running]:
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).checkNextRecoveries(0xc0006b0e00, 0x2b6fee0, 0xc00027eea0, 0x12, 0x0, 0xc0005b6880, 0x4c, 0xc0004fcb40)
            /root/lotus/storage/wdpost_run.go:116 +0x152
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).runPost(0xc0006b0e00, 0x2b6fee0, 0xc00027eea0, 0x8913, 0x829c, 0x11, 0x88fc, 0x895c, 0x88e8, 0x88e8, ...)
            /root/lotus/storage/wdpost_run.go:330 +0x2a0
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).doPost.func1(0xc00038acd0, 0x2b6fe20, 0xc0002d7800, 0xc0006b0e00, 0xc0000da400, 0xc0005b6880)
            /root/lotus/storage/wdpost_run.go:47 +0x171
    created by github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).doPost
            /root/lotus/storage/wdpost_run.go:41 +0xa0

What could be wrong here?

('lotus-storage-miner init" completed successfully beforehand.)

This issue can be ignored.
I am moving on to try the next version of Lotus; some code updates are released.