GenericValue stores a T. So, it potentially has to be aligned. We check this requirement and call Eigen's aligning operator if so.

gtsam/base/GenericValue.h

@@ -187,6 +187,13 @@ public:
       ar & boost::serialization::make_nvp("GenericValue",
               boost::serialization::base_object<Value>(*this));
       ar & boost::serialization::make_nvp("value", value_);
+
+	 // Alignment, see https://eigen.tuxfamily.org/dox/group__TopicStructHavingEigenMembers.html
+	 enum { NeedsToAlign = (sizeof(T) % 16) == 0 };
+
+  public:
+
+	EIGEN_MAKE_ALIGNED_OPERATOR_NEW_IF(NeedsToAlign)
 	}
 
 /// use this macro instead of BOOST_CLASS_EXPORT for GenericValues