1 files changed, 3 insertions, 1 deletions
diff --git a/AST.cpp b/AST.cpp
index fb71e900..fd4cc57c 100644
--- a/AST.cpp
+++ b/AST.cpp
@@ -59,7 +59,9 @@ map<FixedHash<4>, FunctionDefinition const*> ContractDefinition::getInterfaceFun
 		if (f->isPublic() && f->getName() != getName())
 		{
 			FixedHash<4> hash(dev::sha3(f->getCanonicalSignature()));
-			exportedFunctions[hash] = f.get();
+			auto res = exportedFunctions.insert(std::make_pair(hash,f.get()));
+			if (!res.second)
+				solAssert(false, "Hash collision at Function Definition Hash calculation");
 		}
 
 	return exportedFunctions;