step-70: add missing compress() call

fixes #10270

diff --git a/examples/step-70/step-70.cc b/examples/step-70/step-70.cc
index 7ab7f5faff639dd8c16da9a9b509350f2bb4ee0a..89c7c52053268f618bed221e3b379e97791bbde4 100644 (file)
--- a/examples/step-70/step-70.cc
+++ b/examples/step-70/step-70.cc
@@ -1551,6 +1551,9 @@ namespace Step70
                                                system_rhs);
         particle = pic.end();
       }
+
+    system_matrix.compress(VectorOperation::add);
+    system_rhs.compress(VectorOperation::add);
   }