cmd/era: fix iterator error source handling in checkAccumulator #32698
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lightclient
approved these changes
Sep 22, 2025
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This change replaces wrapping a stale outer err with the iterator’s own error after Next(), and switches the post-BlockAndReceipts() check to use the returned err. According to internal/era iterator contract, Error() should be consulted immediately after Next() to surface iteration errors, while decoding errors from Block/Receipts are returned directly. The previous code could hide the real failure (using nil or unrelated err), leading to misleading diagnostics and missed iteration errors.