From 1331869851e729d9a08529a5ff21d12c764b877d Mon Sep 17 00:00:00 2001
From: Daniel Grunwald <daniel@danielgrunwald.de>
Date: Sun, 20 Mar 2011 14:42:38 +0100
Subject: [PATCH] Fixed definite assignment analysis bug.

---
 .../CSharp/Analysis/DefiniteAssignmentAnalysis.cs          | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/NRefactory/ICSharpCode.NRefactory/CSharp/Analysis/DefiniteAssignmentAnalysis.cs b/NRefactory/ICSharpCode.NRefactory/CSharp/Analysis/DefiniteAssignmentAnalysis.cs
index fb723aedc..0c9b4ac28 100644
--- a/NRefactory/ICSharpCode.NRefactory/CSharp/Analysis/DefiniteAssignmentAnalysis.cs
+++ b/NRefactory/ICSharpCode.NRefactory/CSharp/Analysis/DefiniteAssignmentAnalysis.cs
@@ -559,11 +559,14 @@ namespace ICSharpCode.NRefactory.CSharp.Analysis
 			{
 				IdentifierExpression ident = left as IdentifierExpression;
 				if (ident != null && ident.Identifier == analysis.variableName) {
-					right.AcceptVisitor(this, initialStatus);
+					// right==null is special case when handling 'out' expressions
+					if (right != null)
+						right.AcceptVisitor(this, initialStatus);
 					return DefiniteAssignmentStatus.DefinitelyAssigned;
 				} else {
 					DefiniteAssignmentStatus status = left.AcceptVisitor(this, initialStatus);
-					status = right.AcceptVisitor(this, CleanSpecialValues(status));
+					if (right != null)
+						status = right.AcceptVisitor(this, CleanSpecialValues(status));
 					return CleanSpecialValues(status);
 				}
 			}