From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Sat, 29 May 2021 07:43:49 +0000 (+0200)
Subject: Bugfix in MGTwoLevelTransfer::interpolate: forgot to copy vector
X-Git-Tag: v9.3.0~8^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a460920e70f28b27429c142fd948d49c41777f72;p=dealii.git

Bugfix in MGTwoLevelTransfer::interpolate: forgot to copy vector
---

diff --git a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h
index d38b2eb6e3..33c5ab9c6b 100644
--- a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h
+++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h
@@ -2535,6 +2535,10 @@ MGTwoLevelTransfer<dim, LinearAlgebra::distributed::Vector<Number>>::
 
   const bool use_src_inplace = this->vec_fine.size() == 0;
   const auto vec_fine_ptr    = use_src_inplace ? &src : &this->vec_fine;
+
+  if (use_src_inplace == false)
+    this->vec_fine.copy_locally_owned_data_from(src);
+
   if (fine_element_is_continuous || use_src_inplace == false)
     vec_fine_ptr->update_ghost_values();