fix: build 48->49 epoch sync proof within the gc window#15978
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Trisfald merged 1 commit intoJun 25, 2026
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #15978 +/- ##
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+ Coverage 72.60% 72.61% +0.01%
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Files 952 952
Lines 205109 205122 +13
Branches 205109 205122 +13
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+ Hits 148914 148945 +31
+ Misses 51218 51198 -20
- Partials 4977 4979 +2
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shreyan-gupta
approved these changes
Jun 25, 2026
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Same as #15975
Upgrading to 2.13 (DB 48->49) crashed at startup on nodes with
gc_num_epochs_to_keep = 3withDB Not Found Error: epoch block: <hash>.Cause: the migration regenerated the epoch sync proof via
find_target_epoch_to_produce_proof_for, which anchors at the final head and reads BlockInfo ~4 epochs back, which gc=3 has already collected.Fix: build the proof anchored at the current epoch (target head-2), the same way continuous epoch sync does at a boundary. If the node restarted mid-epoch, where even head-2's inputs are collected, fall back to the freshest fully retained epoch (head-1).