fix (ImapServer): Check if task is complete before attempting setResu…

…lt. Fixes #872 (#876)
rnwood · Sep 26, 2021 · e3e290d · e3e290d
1 parent 228554e
commit e3e290d
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/Rnwood.Smtp4dev/Server/ImapServer.cs b/Rnwood.Smtp4dev/Server/ImapServer.cs
@@ -75,7 +75,13 @@ public void TryStart()
 
 
             var errorTcs = new TaskCompletionSource<Error_EventArgs>();
-            imapServer.Error += (s, ea) => errorTcs.SetResult(ea);
+            imapServer.Error += (s, ea) =>
+            {
+                if (!errorTcs.Task.IsCompleted)
+                {
+                    errorTcs.SetResult(ea);
+                }
+            };
             var startedTcs = new TaskCompletionSource<EventArgs>();
             imapServer.Started += (s, ea) => startedTcs.SetResult(ea);