From 73070333674875dad510ff58e13b16cd0efe9f4e Mon Sep 17 00:00:00 2001
From: Cyrus Najmabadi <cyrus.najmabadi@gmail.com>
Date: Wed, 15 May 2024 16:08:00 -0700
Subject: [PATCH] Fix null initial name

---
 .../FindReferences/DependentProjectsFinder.cs            | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Workspaces/Core/Portable/FindSymbols/FindReferences/DependentProjectsFinder.cs b/src/Workspaces/Core/Portable/FindSymbols/FindReferences/DependentProjectsFinder.cs
index 03b7590699e6c..dc87229e40fca 100644
--- a/src/Workspaces/Core/Portable/FindSymbols/FindReferences/DependentProjectsFinder.cs
+++ b/src/Workspaces/Core/Portable/FindSymbols/FindReferences/DependentProjectsFinder.cs
@@ -375,6 +375,15 @@ private static async Task<bool> HasReferenceToAssemblyAsync(Project project, str
 
             using (await s_metadataIdToAssemblyNameGate.DisposableWaitAsync(cancellationToken).ConfigureAwait(false))
             {
+                // Overwrite an existing null name with a non-null one.
+                if (s_metadataIdToAssemblyName.TryGetValue(metadataId, out var existingName) &&
+                    existingName == null &&
+                    name != null)
+                {
+                    s_metadataIdToAssemblyName[metadataId] = name;
+                }
+
+                // Return whatever is in the map, adding ourselves if something is not already there.
                 name = s_metadataIdToAssemblyName.GetOrAdd(metadataId, name);
             }