From d8d37349c3149bffd304057512ee8e6b0f42bc5a Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 29 Jan 2016 12:44:49 +0100
Subject: bug #696: enable zero-sized block at compile-time by relaxing the
 respective assertion

---
 Eigen/src/Core/Block.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'Eigen')

diff --git a/Eigen/src/Core/Block.h b/Eigen/src/Core/Block.h
index cee5591f2..cf962aed1 100644
--- a/Eigen/src/Core/Block.h
+++ b/Eigen/src/Core/Block.h
@@ -129,8 +129,8 @@ template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel> class
       : Impl(xpr, startRow, startCol)
     {
       EIGEN_STATIC_ASSERT(RowsAtCompileTime!=Dynamic && ColsAtCompileTime!=Dynamic,THIS_METHOD_IS_ONLY_FOR_FIXED_SIZE)
-      eigen_assert(startRow >= 0 && BlockRows >= 1 && startRow + BlockRows <= xpr.rows()
-             && startCol >= 0 && BlockCols >= 1 && startCol + BlockCols <= xpr.cols());
+      eigen_assert(startRow >= 0 && BlockRows >= 0 && startRow + BlockRows <= xpr.rows()
+             && startCol >= 0 && BlockCols >= 0 && startCol + BlockCols <= xpr.cols());
     }
 
     /** Dynamic-size constructor
-- 
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