From 39f18939562890d6b28060689f9fb309cebb238c Mon Sep 17 00:00:00 2001
From: Bhargava Shastry <bhargava.shastry@ethereum.org>
Date: Mon, 14 Dec 2020 11:20:31 +0100
Subject: [PATCH] Fix integer overflow due to large unsigned cpp_int

---
 test/tools/ossfuzz/protoToAbiV2.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/tools/ossfuzz/protoToAbiV2.cpp b/test/tools/ossfuzz/protoToAbiV2.cpp
index 4e5b2081a19e..9ea528e1728b 100644
--- a/test/tools/ossfuzz/protoToAbiV2.cpp
+++ b/test/tools/ossfuzz/protoToAbiV2.cpp
@@ -69,7 +69,7 @@ static V integerValue(unsigned _counter)
 	V value = V(
 		u256(solidity::util::keccak256(solidity::util::h256(_counter))) % u256(boost::math::tools::max_value<V>())
 	);
-	if (value % 2 == 0)
+	if (boost::multiprecision::is_signed_number<V>::value && value % 2 == 0)
 		return value * (-1);
 	else
 		return value;