From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Sun, 2 Jul 2023 02:13:38 +0000 (-0600)
Subject: Fix SolutionTransfer to properly compress() vectors.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b188f4384334bb324948b09f933609b82af0515;p=dealii.git

Fix SolutionTransfer to properly compress() vectors.
---

diff --git a/source/numerics/solution_transfer.cc b/source/numerics/solution_transfer.cc
index 90d5885ac8..74bffa4ec3 100644
--- a/source/numerics/solution_transfer.cc
+++ b/source/numerics/solution_transfer.cc
@@ -583,6 +583,11 @@ SolutionTransfer<dim, VectorType, spacedim>::interpolate(
             Assert(false, ExcInternalError());
         }
     }
+
+  // We have written into the output vectors. If this was a PETSc vector, for
+  // example, then we need to compress these to make future operations safe:
+  for (auto &vec : all_out)
+    vec.compress(VectorOperation::insert);
 }