From b7716c032893f4cc6f0e635bcffc2d8bc3d956ab Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Wed, 13 Apr 2016 18:32:56 +0200
Subject: [PATCH] Fix incomplete previous patch on matrix comparision.

---
 Eigen/src/Core/ProductEvaluators.h          | 2 +-
 Eigen/src/Householder/HouseholderSequence.h | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Core/ProductEvaluators.h b/Eigen/src/Core/ProductEvaluators.h
index bd63b87ff..2cdcf1c02 100644
--- a/Eigen/src/Core/ProductEvaluators.h
+++ b/Eigen/src/Core/ProductEvaluators.h
@@ -1007,7 +1007,7 @@ struct transposition_matrix_product
     StorageIndex j = 0;
 
     const typename Dest::Scalar *dst_data = internal::extract_data(dst);
-    if(!(is_same<MatrixTypeCleaned,Dest>::value && dst_data == extract_data(mat)))
+    if(!(is_same<MatrixTypeCleaned,Dest>::value && dst_data!=0 && dst_data == extract_data(mat)))
       dst = mat;
 
     for(Index k=(Transposed?size-1:0) ; Transposed?k>=0:k<size ; Transposed?--k:++k)
diff --git a/Eigen/src/Householder/HouseholderSequence.h b/Eigen/src/Householder/HouseholderSequence.h
index 74cd0a472..3f5f9293b 100644
--- a/Eigen/src/Householder/HouseholderSequence.h
+++ b/Eigen/src/Householder/HouseholderSequence.h
@@ -243,8 +243,9 @@ template<typename VectorsType, typename CoeffsType, int Side> class HouseholderS
     {
       workspace.resize(rows());
       Index vecs = m_length;
+      const typename Dest::Scalar *dst_data = internal::extract_data(dst);
       if(    internal::is_same<typename internal::remove_all<VectorsType>::type,Dest>::value
-          && internal::extract_data(dst) == internal::extract_data(m_vectors))
+          && dst_data!=0 && dst_data == internal::extract_data(m_vectors))
       {
         // in-place
         dst.diagonal().setOnes();