From 31c254b6f59a1ad6f24034e5b728c35cacc99118 Mon Sep 17 00:00:00 2001
From: Peter Munch <peterrmuench@gmail.com>
Date: Fri, 31 Jan 2025 18:29:55 +0100
Subject: [PATCH] Fix step_operations() for MemorySpace::Default>

---
 include/deal.II/lac/precondition.h | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/include/deal.II/lac/precondition.h b/include/deal.II/lac/precondition.h
index d907641fe168..e7a79ec2a1ff 100644
--- a/include/deal.II/lac/precondition.h
+++ b/include/deal.II/lac/precondition.h
@@ -1446,14 +1446,19 @@ namespace internal
     }
 
     // 3) specialized implementation for inverse-diagonal preconditioner
-    template <typename MatrixType,
-              typename VectorType,
-              std::enable_if_t<!IsBlockVector<VectorType>::value &&
-                                 !has_vmult_with_std_functions<
-                                   MatrixType,
-                                   VectorType,
-                                   dealii::DiagonalMatrix<VectorType>>,
-                               VectorType> * = nullptr>
+    template <
+      typename MatrixType,
+      typename VectorType,
+      std::enable_if_t<
+        !IsBlockVector<VectorType>::value &&
+          !std::is_same_v<
+            VectorType,
+            LinearAlgebra::distributed::Vector<typename VectorType::value_type,
+                                               MemorySpace::Default>> &&
+          !has_vmult_with_std_functions<MatrixType,
+                                        VectorType,
+                                        dealii::DiagonalMatrix<VectorType>>,
+        VectorType> * = nullptr>
     void
     step_operations(const MatrixType                         &A,
                     const dealii::DiagonalMatrix<VectorType> &preconditioner,