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Related Issues
This test has been observed to flake, eg: https://app.circleci.com/pipelines/github/filecoin-project/lotus/28677/workflows/bf05c79a-62cf-46ee-b4f7-1aeeeeae02ed/jobs/967190
The test has a faulty assumption that the message lookup height - 2 will always get you a tipset before the relevant message has been included. This is not the case when the tipset after the inclusion tipset is null.
Proposed Changes
The correct way to make this assertion is to actually get heights from the blockchain itself: execution height, inclusion height, "most recent before inclusion height"
Additional Info
Checklist
Before you mark the PR ready for review, please make sure that:
<PR type>: <area>: <change being made>
fix: mempool: Introduce a cache for valid signatures
PR type
: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, testarea
, e.g. api, chain, state, market, mempool, multisig, networking, paych, proving, sealing, wallet, deps