From 42ed43743f68dbf4aa2a3efddcb3ca36d504d066 Mon Sep 17 00:00:00 2001
From: Daniel Burrows <dburrows@debian.org>
Date: Wed, 9 Sep 2009 19:49:23 -0700
Subject: Don't crash when dumping information about a solver without a
 validity condition.

---
 src/generic/problemresolver/incremental_expression.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/generic/problemresolver/incremental_expression.h')

diff --git a/src/generic/problemresolver/incremental_expression.h b/src/generic/problemresolver/incremental_expression.h
index 4c6ecac7..57393ac9 100644
--- a/src/generic/problemresolver/incremental_expression.h
+++ b/src/generic/problemresolver/incremental_expression.h
@@ -658,7 +658,11 @@ template<typename T>
 std::ostream &operator<<(std::ostream &out,
 			 const cwidget::util::ref_ptr<expression<T> > &o)
 {
-  o->dump(out);
+  if(o.valid())
+    o->dump(out);
+  else
+    out << "(null)";
+
   return out;
 }
 
-- 
cgit v1.2.3