From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Mon, 17 Feb 2003 00:06:28 +0000 (+0000)
Subject: Don't segfault if constraint matrix is empty.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9490a05c33a03b374d8b418d5028c8e63e204502;p=dealii-svn.git

Don't segfault if constraint matrix is empty.


git-svn-id: https://svn.dealii.org/trunk@7106 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/deal.II/source/dofs/dof_constraints.cc b/deal.II/deal.II/source/dofs/dof_constraints.cc
index 1bb745694f..38a38a0ff3 100644
--- a/deal.II/deal.II/source/dofs/dof_constraints.cc
+++ b/deal.II/deal.II/source/dofs/dof_constraints.cc
@@ -1100,6 +1100,9 @@ unsigned int ConstraintMatrix::n_constraints () const
 
 bool ConstraintMatrix::is_constrained (const unsigned int index) const 
 {
+  if (lines.size() == 0)
+    return false;
+  
   if (sorted == true)
     {
       ConstraintLine index_comparison;
@@ -1124,6 +1127,9 @@ bool ConstraintMatrix::is_constrained (const unsigned int index) const
 
 bool ConstraintMatrix::is_identity_constrained (const unsigned int index) const 
 {
+  if (lines.size() == 0)
+    return false;
+  
   if (sorted == true)
     {
       ConstraintLine index_comparison;