From: heister <heister@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Wed, 12 Feb 2014 22:32:22 +0000 (+0000)
Subject: detect when assigning PETSc vectors to each other when they are not compress()ed
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=480e351fec64cec684d9a4afc2e691b0c8a9c9a3;p=dealii-svn.git

detect when assigning PETSc vectors to each other when they are not compress()ed

git-svn-id: https://svn.dealii.org/trunk@32464 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/include/deal.II/lac/petsc_parallel_vector.h b/deal.II/include/deal.II/lac/petsc_parallel_vector.h
index eaf007917a..540bf0b23e 100644
--- a/deal.II/include/deal.II/lac/petsc_parallel_vector.h
+++ b/deal.II/include/deal.II/lac/petsc_parallel_vector.h
@@ -596,6 +596,15 @@ namespace PETScWrappers
     Vector &
     Vector::operator = (const Vector &v)
     {
+      // make sure left- and right-hand side of the assignment are compress()'ed:
+      Assert(v.last_action == VectorOperation::unknown,
+            internal::VectorReference::ExcWrongMode (VectorOperation::unknown,
+                                                   v.last_action));
+      Assert(last_action == VectorOperation::unknown,
+            internal::VectorReference::ExcWrongMode (VectorOperation::unknown,
+                                                   last_action));
+
+
       if (v.size()==0)
         {
           // this happens if v has not been initialized to something useful: