From 7f80e23a2b72d5ad4ea4a5271217d3e5bab7a509 Mon Sep 17 00:00:00 2001
From: Sara Itani <sitani@microsoft.com>
Date: Mon, 14 Sep 2015 17:26:31 -0700
Subject: [PATCH] #369 VS Crash - NullReferenceException in Analysis code

---
 Nodejs/Product/Analysis/Analysis/Analyzer/AnalysisUnit.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Nodejs/Product/Analysis/Analysis/Analyzer/AnalysisUnit.cs b/Nodejs/Product/Analysis/Analysis/Analyzer/AnalysisUnit.cs
index 39cdf2e4e..7cf38ec99 100644
--- a/Nodejs/Product/Analysis/Analysis/Analyzer/AnalysisUnit.cs
+++ b/Nodejs/Product/Analysis/Analysis/Analyzer/AnalysisUnit.cs
@@ -233,7 +233,8 @@ public override string ToString() {
                 GetHashCode(),
                 Ast != null ? Ast.GetType().Name : "<unknown>",
                 GetType().Name,
-                Ast != null ? Ast.GetStart(ProjectEntry.Tree.LocationResolver) : SourceLocation.Invalid
+                Ast != null && ProjectEntry != null && ProjectEntry.Tree != null ?
+                    Ast.GetStart(ProjectEntry.Tree.LocationResolver) : SourceLocation.Invalid
             );
         }