From 63464754ef747e0c3d16c5da6fd4d4228ab8dd7a Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Wed, 18 Feb 2015 11:29:54 +0100
Subject: Add an internal assertion in makeCompressed to catch a possible risk
 of null-pointer access.

---
 Eigen/src/SparseCore/SparseMatrix.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'Eigen/src/SparseCore/SparseMatrix.h')

diff --git a/Eigen/src/SparseCore/SparseMatrix.h b/Eigen/src/SparseCore/SparseMatrix.h
index 4c8965802..4562f3df9 100644
--- a/Eigen/src/SparseCore/SparseMatrix.h
+++ b/Eigen/src/SparseCore/SparseMatrix.h
@@ -467,6 +467,8 @@ class SparseMatrix
       if(isCompressed())
         return;
       
+      eigen_internal_assert(m_outerIndex!=0 && m_outerSize>0);
+      
       Index oldStart = m_outerIndex[1];
       m_outerIndex[1] = m_innerNonZeros[0];
       for(Index j=1; j<m_outerSize; ++j)
-- 
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