From d1469f7a387d1d9ef32f21068ed5b8af606115d4 Mon Sep 17 00:00:00 2001
From: cdetrio <cdetrio@gmail.com>
Date: Sat, 10 Nov 2018 18:29:49 -0500
Subject: [PATCH] fix for storageRangeAt when block has 0 tx's

---
 eth/api_tracer.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/eth/api_tracer.go b/eth/api_tracer.go
index 2ebbcc5fd9..28b40b06c9 100644
--- a/eth/api_tracer.go
+++ b/eth/api_tracer.go
@@ -649,6 +649,10 @@ func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int, ree
 	// Recompute transactions up to the target index.
 	signer := types.MakeSigner(api.config, block.Number())
 
+	if len(block.Transactions()) == 0 {
+		return nil, vm.Context{}, statedb, nil
+	}
+
 	for idx, tx := range block.Transactions() {
 		// Assemble the transaction call message and return if the requested offset
 		msg, _ := tx.AsMessage(signer)