From 00e7cd1e0266c818a5e6dc78a5c27dda1ede3af3 Mon Sep 17 00:00:00 2001
From: Kartik Arcot <kartik@verdantrobotics.com>
Date: Sat, 21 Jan 2023 14:08:56 -0800
Subject: [PATCH] hope this resolves ci issue

---
 gtsam/base/tests/testStdOptionalSerialization.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gtsam/base/tests/testStdOptionalSerialization.cpp b/gtsam/base/tests/testStdOptionalSerialization.cpp
index a5aa815cd..dd99b0f12 100644
--- a/gtsam/base/tests/testStdOptionalSerialization.cpp
+++ b/gtsam/base/tests/testStdOptionalSerialization.cpp
@@ -60,6 +60,8 @@ public:
   TestOptionalStruct() = default;
   TestOptionalStruct(const int& opt)
       : opt(opt) {}
+  // A copy constructor is needed for serialization
+  TestOptionalStruct(const TestOptionalStruct& other) = default;
   bool operator==(const TestOptionalStruct& other) const {
     // check the values are equal
     return *opt == *other.opt;