From b0dc221dad4c47f3acf78501f8ba002b26b1fbe3 Mon Sep 17 00:00:00 2001
From: Simon Praetorius <simon.praetorius@tu-dresden.de>
Date: Sat, 15 Feb 2025 17:40:18 +0100
Subject: [PATCH] Fix assignment operator of FieldMatrix with different field
 type

---
 dune/common/fmatrix.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dune/common/fmatrix.hh b/dune/common/fmatrix.hh
index 42c379ea9..59d3db71b 100644
--- a/dune/common/fmatrix.hh
+++ b/dune/common/fmatrix.hh
@@ -163,7 +163,7 @@ namespace Dune
     template<typename T>
     FieldMatrix& operator=(const FieldMatrix<T, ROWS, COLS>& x)
     {
-      _data = x._data;
+      std::copy(x.begin(), x.end(), this->begin());
       return *this;
     }
 
-- 
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