From c15c6d26b7c414feb0b78aa8b0f3b88d958b34b8 Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Wed, 13 Jan 2021 14:34:48 +0000
Subject: [PATCH] Fix YulUtilFunctions::negateNumberWrappingFunction

---
 libsolidity/codegen/YulUtilFunctions.cpp                       | 2 +-
 test/libsolidity/semanticTests/various/flipping_sign_tests.sol | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libsolidity/codegen/YulUtilFunctions.cpp b/libsolidity/codegen/YulUtilFunctions.cpp
index 52639a5f6..7d275e6f8 100644
--- a/libsolidity/codegen/YulUtilFunctions.cpp
+++ b/libsolidity/codegen/YulUtilFunctions.cpp
@@ -3765,7 +3765,7 @@ string YulUtilFunctions::negateNumberWrappingFunction(Type const& _type)
 	return m_functionCollector.createFunction(functionName, [&]() {
 		return Whiskers(R"(
 			function <functionName>(value) -> ret {
-				value := <cleanupFunction>(sub(0, value)))
+				ret := <cleanupFunction>(sub(0, value))
 			}
 		)")
 		("functionName", functionName)
diff --git a/test/libsolidity/semanticTests/various/flipping_sign_tests.sol b/test/libsolidity/semanticTests/various/flipping_sign_tests.sol
index 922494be7..fb7587ffe 100644
--- a/test/libsolidity/semanticTests/various/flipping_sign_tests.sol
+++ b/test/libsolidity/semanticTests/various/flipping_sign_tests.sol
@@ -6,5 +6,7 @@ contract test {
     }
 }
 
+// ====
+// compileViaYul: also
 // ----
 // f() -> true