EIGEN PATCH for

Author: SteveBronder

lib/eigen_5.0.1/Eigen/src/Core/Fill.h

@@ -94,7 +94,7 @@ struct eigen_fill_impl<Xpr, /*use_fill*/ true> {
 template <typename Xpr>
 struct eigen_memset_helper {
   static constexpr bool value =
-      std::is_trivially_copyable<typename Xpr::Scalar>::value && eigen_fill_helper<Xpr>::value;
+      std::is_trivially_copyable<typename Xpr::Scalar>::value && eigen_fill_helper<Xpr>::value && !NumTraits<Xpr>::RequireInitialization;
 };
 
 template <typename Xpr>