diff --git a/core/vm/evm.go b/core/vm/evm.go
index 6ab7642544..6137d0f740 100644
--- a/core/vm/evm.go
+++ b/core/vm/evm.go
@@ -545,6 +545,8 @@ func (evm *EVM) captureEnd(depth int, typ OpCode, startGas uint64, leftOverGas u
 	}
 }
 
+// GetVMContext provides context about the block being executed as well as state
+// to the tracers.
 func (evm *EVM) GetVMContext() *tracing.VMContext {
 	return &tracing.VMContext{
 		Coinbase:    evm.Context.Coinbase,
diff --git a/eth/tracers/logger/logger.go b/eth/tracers/logger/logger.go
index f8ebe52aa2..9d6f4c8a19 100644
--- a/eth/tracers/logger/logger.go
+++ b/eth/tracers/logger/logger.go
@@ -184,9 +184,7 @@ func (l *StructLogger) OnOpcode(pc uint64, opcode byte, gas, cost uint64, scope
 	var stck []uint256.Int
 	if !l.cfg.DisableStack {
 		stck = make([]uint256.Int, len(stack))
-		for i, item := range stack {
-			stck[i] = item
-		}
+		copy(stck, stack)
 	}
 	contractAddr := scope.Address()
 	stackLen := len(stack)