Add regression test for unaligned checkpoint sync with payload pruning #8458
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This adds a regression test for sigp#8426. When `prune_payloads` is enabled, unaligned checkpoint syncs (where the anchor block is older than the checkpoint state) were previously failing to import the anchor block's execution payload. The new test `reproduction_unaligned_checkpoint_sync_pruned_payload` reproduces this scenario and asserts that the Beacon Chain initializes successfully (which confirms the anchor payload was correctly loaded).
Andrurachi
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michaelsproul
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Dec 15, 2025
Merge Queue Status✅ The pull request has been merged at 6f1f4ca This pull request spent 39 minutes 3 seconds in the queue, including 37 minutes 19 seconds running CI. Required conditions to merge
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Issue Addressed
Closes #8426
Proposed Changes
Added a new regression test:
reproduction_unaligned_checkpoint_sync_pruned_payload.This test reproduces the bug where unaligned checkpoint syncs (skipped slots at epoch boundaries) fail to import the anchor block's execution payload when
prune_payloadsis enabled.The test simulates the failure mode by:
It asserts that the Beacon Chain builds successfully (previously it panicked with
MissingFullBlockExecutionPayloadPruned), confirming the fix logic intry_get_full_block.