lint fixes (#1717)

.golangci.yml

@@ -44,3 +44,6 @@ issues:
         - gosec
         - unused
         - deadcode
+    - path: metrics/sample\.go
+      linters:
+        - gosec

core/state/state_object.go

@@ -239,6 +239,7 @@ func (so *stateObject) setState(key *common.Hash, value uint256.Int) {
 // updateTrie writes cached storage modifications into the object's storage trie.
 func (so *stateObject) updateTrie(ctx context.Context, stateWriter StateWriter) error {
 	for key, value := range so.dirtyStorage {
+		value := value
 		original := so.blockOriginStorage[key]
 		so.originStorage[key] = value
 		if err := stateWriter.WriteAccountStorage(ctx, so.address, so.data.GetIncarnation(), &key, &original, &value); err != nil {

eth/filters/api.go

@@ -280,6 +280,7 @@ func (api *PublicFilterAPI) Logs(ctx context.Context, crit FilterCriteria) (*rpc
 			select {
 			case logs := <-matchedLogs:
 				for _, log := range logs {
+					log := log
 					notifier.Notify(rpcSub.ID, &log)
 				}
 			case <-rpcSub.Err(): // client send an unsubscribe request