From b74118ec57b2316c843961fc3e1dbb2e5eef35dd Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Fri, 28 Jul 2017 10:06:49 +0200
Subject: Fix for invalid clearing of memory in ecrecover.

---
 libsolidity/codegen/ExpressionCompiler.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libsolidity/codegen/ExpressionCompiler.cpp')

diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp
index a35008bf..02cc62be 100644
--- a/libsolidity/codegen/ExpressionCompiler.cpp
+++ b/libsolidity/codegen/ExpressionCompiler.cpp
@@ -1622,7 +1622,7 @@ void ExpressionCompiler::appendExternalFunctionCall(
 		// zero bytes (which we cannot detect).
 		solAssert(0 < retSize && retSize <= 32, "");
 		utils().fetchFreeMemoryPointer();
-		m_context << Instruction::DUP1 << u256(0) << Instruction::MSTORE;
+		m_context << u256(0) << Instruction::DUP2 << Instruction::MSTORE;
 		m_context << u256(32) << Instruction::ADD;
 		utils().storeFreeMemoryPointer();
 	}
-- 
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