From 376de68f207519786e9a455e9d137eb63fea9c15 Mon Sep 17 00:00:00 2001
From: Kevin Halverson <kevinh@microsoft.com>
Date: Fri, 25 Sep 2015 12:14:03 -0700
Subject: [PATCH] Add null check in SemanticModelService for #load'ed trees...

---
 .../SemanticModelWorkspaceServiceFactory.cs            | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Workspaces/Core/Portable/SemanticModelWorkspaceService/SemanticModelWorkspaceServiceFactory.cs b/src/Workspaces/Core/Portable/SemanticModelWorkspaceService/SemanticModelWorkspaceServiceFactory.cs
index a914181549d..74576bc646b 100644
--- a/src/Workspaces/Core/Portable/SemanticModelWorkspaceService/SemanticModelWorkspaceServiceFactory.cs
+++ b/src/Workspaces/Core/Portable/SemanticModelWorkspaceService/SemanticModelWorkspaceServiceFactory.cs
@@ -485,7 +485,15 @@ private CompilationSet(VersionStamp version, ValueSource<Compilation> compilatio
                         }
 
                         var documentId = newProject.GetDocumentId(newTree);
-                        Contract.Requires(documentId != null);
+
+                        // GetDocumentId will return null for #load'ed trees.
+                        // TODO:  Remove this check and add logic to fetch the #load'ed tree's
+                        // Document once https://github.com/dotnet/roslyn/issues/5260 is fixed.
+                        if (documentId == null)
+                        {
+                            Debug.Assert(newProject.Solution.Workspace.Kind == "Interactive");
+                            continue;
+                        }
 
                         map = map.SetItem(documentId, newTree);
                     }
-- 
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