From 26f303f3ed39fbb89bb1c87159a2b08f47fa4ea5 Mon Sep 17 00:00:00 2001
From: Nick Johnson <arachnid@notdot.net>
Date: Tue, 9 Jan 2018 13:15:50 +0000
Subject: [PATCH] eth/gasprice: Make a copy of transaction pointers before
 sorting

---
 eth/gasprice/gasprice.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/eth/gasprice/gasprice.go b/eth/gasprice/gasprice.go
index 2b7870e05b..54325692c6 100644
--- a/eth/gasprice/gasprice.go
+++ b/eth/gasprice/gasprice.go
@@ -167,7 +167,9 @@ func (gpo *Oracle) getBlockPrices(ctx context.Context, signer types.Signer, bloc
 		return
 	}
 
-	txs := block.Transactions()
+	blockTxs := block.Transactions()
+	txs := make([]*types.Transaction, len(blockTxs))
+	copy(txs, blockTxs)
 	sort.Sort(transactionsByGasPrice(txs))
 
 	for _, tx := range txs {