cow: always process KvMods to add OldData to mods when building StateDeltas #4804
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jannotti
reviewed
Nov 16, 2022
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+1 to remove, empty blocks are rare :) |
|
Removed the guard clause |
Codecov Report
@@ Coverage Diff @@
## master #4804 +/- ##
==========================================
- Coverage 54.68% 54.66% -0.03%
==========================================
Files 414 414
Lines 53550 53552 +2
==========================================
- Hits 29286 29273 -13
- Misses 21836 21851 +15
Partials 2428 2428
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Test that old data is populated by roundCowState.deltas()
algorandskiy
approved these changes
Nov 17, 2022
| kvMods[name] = ledgercore.KvValueDelta{Data: nil} | ||
| // needs an old data, else optimized away. | ||
| // if oldData = "" there is the best chance of a bug, so we use that | ||
| kvMods[name] = ledgercore.KvValueDelta{Data: nil, OldData: []byte("")} |
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Suggested change
| kvMods[name] = ledgercore.KvValueDelta{Data: nil, OldData: []byte("")} | |
| kvMods[name] = ledgercore.KvValueDelta{Data: nil, OldData: []byte{}} |
michaeldiamant
approved these changes
Nov 17, 2022
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As intended, I confirmed the added tests fail in master while passing in the PR.
@cce Thanks again for your efforts to isolate + find the issue!
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Summary
Through debugging we noticed OldData was not set when it should be. Later we realized that roundCowState.deltas() was not always adding OldData to KvMods, and the early exit on empty sdeltas was the culprit.
Test Plan
Existing tests should pass, maybe we should have new tests for this kind of thing.