From 502f7179801a9b6ae5f6d6df60e72d5064702925 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Wed, 16 Jan 2019 14:33:45 +0100
Subject: bug #1646: disable aliasing detection for empty and 1x1 expression

---
 Eigen/src/Core/Transpose.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'Eigen/src/Core/Transpose.h')

diff --git a/Eigen/src/Core/Transpose.h b/Eigen/src/Core/Transpose.h
index d7c204579..6255a2f6d 100644
--- a/Eigen/src/Core/Transpose.h
+++ b/Eigen/src/Core/Transpose.h
@@ -392,7 +392,8 @@ struct checkTransposeAliasing_impl<Derived, OtherDerived, false>
 template<typename Dst, typename Src>
 void check_for_aliasing(const Dst &dst, const Src &src)
 {
-  internal::checkTransposeAliasing_impl<Dst, Src>::run(dst, src);
+  if(src.size()>1)
+    internal::checkTransposeAliasing_impl<Dst, Src>::run(dst, src);
 }
 
 } // end namespace internal
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