From: Peter Munch <peterrmuench@gmail.com>
Date: Wed, 24 Mar 2021 15:38:11 +0000 (+0100)
Subject: Derive PETScWrappers::PreconditionBase from Subscriptor
X-Git-Tag: v9.3.0-rc1~285^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbacd962e10db4c3b876ce2a58585902c2f93b2e;p=dealii.git

Derive PETScWrappers::PreconditionBase from Subscriptor
---

diff --git a/include/deal.II/lac/petsc_precondition.h b/include/deal.II/lac/petsc_precondition.h
index c5a27bbc62..6e4f36dc4f 100644
--- a/include/deal.II/lac/petsc_precondition.h
+++ b/include/deal.II/lac/petsc_precondition.h
@@ -19,6 +19,8 @@
 
 #  include <deal.II/base/config.h>
 
+#  include <deal.II/base/subscriptor.h>
+
 #  ifdef DEAL_II_WITH_PETSC
 
 #    include <deal.II/lac/exceptions.h>
@@ -53,7 +55,7 @@ namespace PETScWrappers
    *
    * @ingroup PETScWrappers
    */
-  class PreconditionBase
+  class PreconditionBase : public Subscriptor
   {
   public:
     /**