4 files changed, 9 insertions, 9 deletions
diff --git a/core/state/iterator_test.go b/core/state/iterator_test.go
index aa05c5dfe..aa9c5b728 100644
--- a/core/state/iterator_test.go
+++ b/core/state/iterator_test.go
@@ -41,7 +41,7 @@ func TestNodeIteratorCoverage(t *testing.T) {
 		}
 	}
 	// Cross check the hashes and the database itself
-	for hash, _ := range hashes {
+	for hash := range hashes {
 		if _, err := db.Get(hash.Bytes()); err != nil {
 			t.Errorf("failed to retrieve reported node %x: %v", hash, err)
 		}
diff --git a/core/state/managed_state_test.go b/core/state/managed_state_test.go
index 3f7bc2aa8..d9c232ebb 100644
--- a/core/state/managed_state_test.go
+++ b/core/state/managed_state_test.go
@@ -52,7 +52,7 @@ func TestRemove(t *testing.T) {
 	ms, account := create()
 
 	nn := make([]bool, 10)
-	for i, _ := range nn {
+	for i := range nn {
 		nn[i] = true
 	}
 	account.nonces = append(account.nonces, nn...)
@@ -68,7 +68,7 @@ func TestReuse(t *testing.T) {
 	ms, account := create()
 
 	nn := make([]bool, 10)
-	for i, _ := range nn {
+	for i := range nn {
 		nn[i] = true
 	}
 	account.nonces = append(account.nonces, nn...)
@@ -84,7 +84,7 @@ func TestReuse(t *testing.T) {
 func TestRemoteNonceChange(t *testing.T) {
 	ms, account := create()
 	nn := make([]bool, 10)
-	for i, _ := range nn {
+	for i := range nn {
 		nn[i] = true
 	}
 	account.nonces = append(account.nonces, nn...)
diff --git a/core/state/statedb.go b/core/state/statedb.go
index bbcde9443..75c40b364 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -479,7 +479,7 @@ func (self *StateDB) Copy() *StateDB {
 		logSize:           self.logSize,
 	}
 	// Copy the dirty states and logs
-	for addr, _ := range self.stateObjectsDirty {
+	for addr := range self.stateObjectsDirty {
 		state.stateObjects[addr] = self.stateObjects[addr].deepCopy(state, state.MarkStateObjectDirty)
 		state.stateObjectsDirty[addr] = struct{}{}
 	}
@@ -530,7 +530,7 @@ func (self *StateDB) GetRefund() *big.Int {
 // It is called in between transactions to get the root hash that
 // goes into transaction receipts.
 func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash {
-	for addr, _ := range s.stateObjectsDirty {
+	for addr := range s.stateObjectsDirty {
 		stateObject := s.stateObjects[addr]
 		if stateObject.suicided || (deleteEmptyObjects && stateObject.empty()) {
 			s.deleteStateObject(stateObject)
@@ -553,7 +553,7 @@ func (s *StateDB) DeleteSuicides() {
 	// Reset refund so that any used-gas calculations can use this method.
 	s.clearJournalAndRefund()
 
-	for addr, _ := range s.stateObjectsDirty {
+	for addr := range s.stateObjectsDirty {
 		stateObject := s.stateObjects[addr]
 
 		// If the object has been removed by a suicide
diff --git a/core/state/sync_test.go b/core/state/sync_test.go
index 2a30c86f4..cb585f78c 100644
--- a/core/state/sync_test.go
+++ b/core/state/sync_test.go
@@ -198,7 +198,7 @@ func testIterativeRandomStateSync(t *testing.T, batch int) {
 	for len(queue) > 0 {
 		// Fetch all the queued nodes in a random order
 		results := make([]trie.SyncResult, 0, len(queue))
-		for hash, _ := range queue {
+		for hash := range queue {
 			data, err := srcDb.Get(hash.Bytes())
 			if err != nil {
 				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
@@ -235,7 +235,7 @@ func TestIterativeRandomDelayedStateSync(t *testing.T) {
 	for len(queue) > 0 {
 		// Sync only half of the scheduled nodes, even those in random order
 		results := make([]trie.SyncResult, 0, len(queue)/2+1)
-		for hash, _ := range queue {
+		for hash := range queue {
 			delete(queue, hash)
 
 			data, err := srcDb.Get(hash.Bytes())