From 3e0505a0c7e2d305bca629d2186e19ad7d211c91 Mon Sep 17 00:00:00 2001
From: wgr523 <wgr523@gmail.com>
Date: Thu, 25 May 2023 12:23:27 +0800
Subject: [PATCH] cherry-pick from
 https://github.com/ethereum/go-ethereum/commit/d8ada03eacbb54c18105f6c3f6f6d6ff4536f5b0
 (#255)

---
 core/vm/contracts.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/vm/contracts.go b/core/vm/contracts.go
index e7a19a3b21..28394d4dd2 100644
--- a/core/vm/contracts.go
+++ b/core/vm/contracts.go
@@ -176,7 +176,7 @@ func (c *dataCopy) RequiredGas(input []byte) uint64 {
 	return uint64(len(input)+31)/32*params.IdentityPerWordGas + params.IdentityBaseGas
 }
 func (c *dataCopy) Run(in []byte) ([]byte, error) {
-	return in, nil
+	return common.CopyBytes(in), nil
 }
 
 // bigModExp implements a native big integer exponential modular operation.