diff --git a/oscar64/Constexpr.cpp b/oscar64/Constexpr.cpp
index 6f52b05..a0de135 100644
--- a/oscar64/Constexpr.cpp
+++ b/oscar64/Constexpr.cpp
@@ -418,8 +418,13 @@ void ConstexprInterpreter::Value::Assign(const Value& v)
 	case DT_TYPE_STRUCT:
 	case DT_TYPE_UNION:
 	case DT_TYPE_ARRAY:
-		memcpy(GetAddr(), v.GetAddr(), mDecType->mSize);
-		break;
+	{
+		const ConstexprInterpreter::ValueItem* sp = v.GetAddr();
+		ConstexprInterpreter::ValueItem* dp = GetAddr();
+
+		for (int i = 0; i < mDecType->mSize; i++)
+			dp[i] = sp[i];
+	}	break;
 	case DT_TYPE_POINTER:
 		PutPtr(v.GetPtr());
 		break;
@@ -1260,7 +1265,7 @@ ConstexprInterpreter::Value ConstexprInterpreter::Eval(Expression* exp)
 
 	mErrors->Error(exp->mLocation, EERR_INVALID_CONSTEXPR, "Invalid constexpr");
 
-	return exp;
+	return Value();
 }
 
 ConstexprInterpreter::Flow ConstexprInterpreter::Execute(Expression* exp)
diff --git a/oscar64/Parser.cpp b/oscar64/Parser.cpp
index 9a6643a..5650e0d 100644
--- a/oscar64/Parser.cpp
+++ b/oscar64/Parser.cpp
@@ -6301,6 +6301,8 @@ Expression* Parser::ParsePostfixExpression(bool lhs)
 			if (exp->mDecType->ValueType() == DT_TYPE_STRUCT)
 			{
 				nexp = CheckOperatorOverload(nexp);
+				if (nexp->mType == EX_INDEX)
+					mErrors->Error(mScanner->mLocation, EERR_INVALID_INDEX, "No indexing operator found");
 			}
 			else if (exp->mDecType->mType == DT_TYPE_ARRAY || exp->mDecType->mType == DT_TYPE_POINTER)
 			{