From f53155d78460c4facc12fefd3611f36a73e10ba5 Mon Sep 17 00:00:00 2001
From: CyrusNajmabadi <cyrusn@microsoft.com>
Date: Sat, 19 Nov 2016 12:26:03 -0800
Subject: [PATCH] Support not finding a factory.

---
 src/EditorFeatures/Core/GoToDefinition/GoToDefinitionHelpers.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/EditorFeatures/Core/GoToDefinition/GoToDefinitionHelpers.cs b/src/EditorFeatures/Core/GoToDefinition/GoToDefinitionHelpers.cs
index ed5d4809bde..5548ff13d42 100644
--- a/src/EditorFeatures/Core/GoToDefinition/GoToDefinitionHelpers.cs
+++ b/src/EditorFeatures/Core/GoToDefinition/GoToDefinitionHelpers.cs
@@ -53,7 +53,7 @@ internal static class GoToDefinitionHelpers
             if (thirdPartyNavigationAllowed )
             {
                 var factory = solution.Workspace.Services.GetService<IDefinitionsAndReferencesFactory>();
-                var thirdPartyItem = factory.GetThirdPartyDefinitionItem(solution, symbol);
+                var thirdPartyItem = factory?.GetThirdPartyDefinitionItem(solution, symbol);
                 definitions.AddIfNotNull(thirdPartyItem);
             }
 
-- 
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