From 5be00b0e29647480c21cafc791f0b7a1549b59a0 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Thu, 30 Aug 2018 17:14:52 +0200
Subject: [PATCH] Product of empty array must be 1 and not 0.

---
 unsupported/Eigen/CXX11/src/util/EmulateCXX11Meta.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unsupported/Eigen/CXX11/src/util/EmulateCXX11Meta.h b/unsupported/Eigen/CXX11/src/util/EmulateCXX11Meta.h
index f3aa1b144..8a536faf6 100644
--- a/unsupported/Eigen/CXX11/src/util/EmulateCXX11Meta.h
+++ b/unsupported/Eigen/CXX11/src/util/EmulateCXX11Meta.h
@@ -188,7 +188,7 @@ EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE t array_prod(const array<t, n>& a) {
 }
 template<typename t>
 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE t array_prod(const array<t, 0>& /*a*/) {
-  return 0;
+  return 1;
 }
 
 template<typename t>