Panic in recalculateFirstForSubj

[aldiesel]

What version were you using?

v2.9.22

What environment was the server running in?

Kubernetes/Linux

Is this defect reproducible?

I'm not sure how to reproduce this, but this out of bounds access may be related to the fix that was put in for this issue? #4445
8865c2a
Maybe this caused the out of bounds access

[1] 2023/09/13 15:35:12.278427 [DBG] JETSTREAM - JetStream connection closed: Client Closed
panic: runtime error: slice bounds out of range [-3785495:]

goroutine 30 [running]:
github.com/nats-io/nats-server/v2/server.(*msgBlock).recalculateFirstForSubj(0xc01d4b2680, {0xc023bedb80, 0x77}, 0xba431, 0xc0126d6500)
    github.com/nats-io/nats-server/v2/server/filestore.go:5979 +0x2ca
github.com/nats-io/nats-server/v2/server.(*fileStore).firstSeqForSubj(0xc00aa80580, {0xc023bedb80, 0x77})
    github.com/nats-io/nats-server/v2/server/filestore.go:2584 +0x1c6
github.com/nats-io/nats-server/v2/server.(*fileStore).storeRawMsg(0xc00aa80580, {0xc023bedb80, 0x77}, {0xc02339efc0, 0x205, 0x205}, {0xc01bfef8c0, 0x293, 0x293}, 0xc422b, ...)
    github.com/nats-io/nats-server/v2/server/filestore.go:2389 +0x675
github.com/nats-io/nats-server/v2/server.(*fileStore).StoreMsg(0xc00aa80580, {0xc023bedb80, 0x77}, {0xc02339efc0, 0x205, 0x205}, {0xc01bfef8c0, 0x293, 0x293})
    github.com/nats-io/nats-server/v2/server/filestore.go:2453 +0x155
github.com/nats-io/nats-server/v2/server.(*stream).processJetStreamMsg(0xc00a96ae00, {0xc023bedb80, 0x77}, {0xc27923c480, 0x14}, {0xc02339efc0, 0x205, 0x205}, {0xc01bfef8c0, 0x293, ...}, ...)
    github.com/nats-io/nats-server/v2/server/stream.go:4051 +0x1d1d
github.com/nats-io/nats-server/v2/server.(*stream).internalLoop(0xc00a96ae00)
    github.com/nats-io/nats-server/v2/server/stream.go:4474 +0x1025
created by github.com/nats-io/nats-server/v2/server.(*stream).setupSendCapabilities
    github.com/nats-io/nats-server/v2/server/stream.go:4353 +0x1bc
Stream closed EOF for redacted

Given the capability you are leveraging, describe your expectation?

N/A

Given the expectation, what is the defect you are observing?

The server panicked