From 0ee50ac3a15247a99d51376a71b520e603961e57 Mon Sep 17 00:00:00 2001
From: Marc Fehling <mafehling.git@gmail.com>
Date: Fri, 4 Jun 2021 21:30:45 -0600
Subject: [PATCH] Make `hp::FEValuesBase` derive from `Subscriptor`.

---
 include/deal.II/hp/fe_values.h | 2 +-
 source/hp/fe_values.cc         | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/deal.II/hp/fe_values.h b/include/deal.II/hp/fe_values.h
index b07d3009e9..0456fbddcd 100644
--- a/include/deal.II/hp/fe_values.h
+++ b/include/deal.II/hp/fe_values.h
@@ -66,7 +66,7 @@ namespace hp
    * @ingroup hp
    */
   template <int dim, int q_dim, class FEValuesType>
-  class FEValuesBase
+  class FEValuesBase : public Subscriptor
   {
   public:
     /**
diff --git a/source/hp/fe_values.cc b/source/hp/fe_values.cc
index e026c61790..51e40fe29b 100644
--- a/source/hp/fe_values.cc
+++ b/source/hp/fe_values.cc
@@ -135,7 +135,8 @@ namespace hp
   template <int dim, int q_dim, class FEValuesType>
   FEValuesBase<dim, q_dim, FEValuesType>::FEValuesBase(
     const FEValuesBase<dim, q_dim, FEValuesType> &other)
-    : fe_collection(other.fe_collection)
+    : Subscriptor(other)
+    , fe_collection(other.fe_collection)
     , mapping_collection(other.mapping_collection)
     , q_collection(other.q_collection)
     , q_collections(other.q_collections)
-- 
2.39.5