From f47e6e90fb55066ff602a1448fc2d3f650449559 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Fri, 23 Jun 2017 18:37:15 +0200
Subject: Disallow comparisons between some types.

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

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

diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp
index a7cfe4dc..a65549fd 100644
--- a/libsolidity/codegen/ExpressionCompiler.cpp
+++ b/libsolidity/codegen/ExpressionCompiler.cpp
@@ -1366,6 +1366,7 @@ void ExpressionCompiler::appendAndOrOperatorCode(BinaryOperation const& _binaryO
 
 void ExpressionCompiler::appendCompareOperatorCode(Token::Value _operator, Type const& _type)
 {
+	solAssert(_type.sizeOnStack() == 1, "Comparison of multi-slot types.");
 	if (_operator == Token::Equal || _operator == Token::NotEqual)
 	{
 		if (FunctionType const* funType = dynamic_cast<decltype(funType)>(&_type))
-- 
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