From b7ea59556dbf9c73b05638a041cff1c37b664d90 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Thu, 20 Dec 2012 11:21:47 +0100
Subject: [PATCH] Fix bug #507: Mark variable as unused in NDEBUG case

---
 Eigen/src/Core/PlainObjectBase.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Eigen/src/Core/PlainObjectBase.h b/Eigen/src/Core/PlainObjectBase.h
index bef79d3d7..5c94ef621 100644
--- a/Eigen/src/Core/PlainObjectBase.h
+++ b/Eigen/src/Core/PlainObjectBase.h
@@ -564,6 +564,7 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
       eigen_assert((this->size()==0 || (IsVectorAtCompileTime ? (this->size() == other.size())
                  : (rows() == other.rows() && cols() == other.cols())))
         && "Size mismatch. Automatic resizing is disabled because EIGEN_NO_AUTOMATIC_RESIZING is defined");
+      EIGEN_ONLY_USED_FOR_DEBUG(other);
       #else
       resizeLike(other);
       #endif