diff --git a/Makefile b/Makefile
index 6fc8f26071..906e8c06a0 100644
--- a/Makefile
+++ b/Makefile
@@ -180,6 +180,3 @@ debug_external: clean
 
 build_localnet_validator:
 	bash test/build-localnet-validator.sh
-
-tt:
-	go test -v -test.run OnDisconnectCheck ./p2p/security
\ No newline at end of file
diff --git a/core/blockchain_impl.go b/core/blockchain_impl.go
index b12de56373..e9eca1f4cd 100644
--- a/core/blockchain_impl.go
+++ b/core/blockchain_impl.go
@@ -1682,8 +1682,6 @@ func (bc *BlockChainImpl) insertChain(chain types.Blocks, verifyHeaders bool) (i
 	if len(chain) == 0 {
 		return 0, nil, nil, ErrEmptyChain
 	}
-	first := chain[0]
-	fmt.Println("insertChain", utils.GetPort(), first.ShardID(), first.Epoch().Uint64(), first.NumberU64())
 	// Do a sanity check that the provided chain is actually ordered and linked
 	for i := 1; i < len(chain); i++ {
 		if chain[i].NumberU64() != chain[i-1].NumberU64()+1 || chain[i].ParentHash() != chain[i-1].Hash() {
diff --git a/core/state_processor.go b/core/state_processor.go
index 6ea9e244a6..9ccb256a78 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -310,7 +310,15 @@ func ApplyTransaction(bc ChainContext, author *common.Address, gp *GasPool, stat
 	// Apply the transaction to the current state (included in the env)
 	result, err := ApplyMessage(vmenv, msg, gp)
 	if err != nil {
-		return nil, nil, nil, 0, errors.Wrapf(err, "apply failed from='%s' to='%s' balance='%s'", msg.From().Hex(), msg.To().Hex(), statedb.GetBalance(msg.From()).String())
+		to := ""
+		if m := msg.To(); m != nil {
+			to = m.Hex()
+		}
+		balance := ""
+		if a := statedb.GetBalance(msg.From()); a != nil {
+			balance = a.String()
+		}
+		return nil, nil, nil, 0, errors.Wrapf(err, "apply failed from='%s' to='%s' balance='%s'", msg.From().Hex(), to, balance)
 	}
 	// Update the state with pending changes
 	var root []byte