From ba722487d8c7be977d8246e152131e9c1d829b2f Mon Sep 17 00:00:00 2001
From: Robert McRackan <rmcrackan@metabolon.com>
Date: Tue, 21 Jun 2022 21:08:49 -0400
Subject: [PATCH] Non-null disposed BlockingCollection can throw exception

---
 Source/FileManager/BackgroundFileSystem.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Source/FileManager/BackgroundFileSystem.cs b/Source/FileManager/BackgroundFileSystem.cs
index 4f68003d..f3f9a747 100644
--- a/Source/FileManager/BackgroundFileSystem.cs
+++ b/Source/FileManager/BackgroundFileSystem.cs
@@ -79,8 +79,13 @@ namespace FileManager
             //Stop raising events
             fileSystemWatcher?.Dispose();
 
-            //Calling CompleteAdding() will cause background scanner to terminate.
-            directoryChangesEvents?.CompleteAdding();
+            try
+            {
+                //Calling CompleteAdding() will cause background scanner to terminate.
+                directoryChangesEvents?.CompleteAdding();
+            }
+            // if directoryChangesEvents is non-null and isDisposed, this exception is thrown. there's no other way to check >:(
+            catch (ObjectDisposedException) { }
 
             //Wait for background scanner to terminate before reinitializing.
             backgroundScanner?.Wait();