From dccb35866043ca6838b5faa20b9953f06fda108a Mon Sep 17 00:00:00 2001
From: lightclient <lightclient@protonmail.com>
Date: Mon, 22 Sep 2025 11:48:58 -0600
Subject: [PATCH] cmd/era: also check iterator error after loop

---
 cmd/era/main.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/cmd/era/main.go b/cmd/era/main.go
index 893db3787a..35a889d4dc 100644
--- a/cmd/era/main.go
+++ b/cmd/era/main.go
@@ -273,8 +273,8 @@ func checkAccumulator(e *era.Era) error {
 	// accumulation across the entire set and are verified at the end.
 	for it.Next() {
 		// 1) next() walks the block index, so we're able to implicitly verify it.
-		if itErr := it.Error(); itErr != nil {
-			return fmt.Errorf("error reading block %d: %w", it.Number(), itErr)
+		if it.Error() != nil {
+			return fmt.Errorf("error reading block %d: %w", it.Number(), it.Error())
 		}
 		block, receipts, err := it.BlockAndReceipts()
 		if err != nil {
@@ -294,6 +294,9 @@ func checkAccumulator(e *era.Era) error {
 		td.Add(td, block.Difficulty())
 		tds = append(tds, new(big.Int).Set(td))
 	}
+	if it.Error() != nil {
+		return fmt.Errorf("error reading block %d: %w", it.Number(), it.Error())
+	}
 	// 4+5) Verify accumulator and total difficulty.
 	got, err := era.ComputeAccumulator(hashes, tds)
 	if err != nil {