Accept live UniverseProvider returning null (#8222)

- Similar to HistoryProviders and Live DataQueueHandler calls, adjust live Universe provider manager to handle null returned values
QuantConnect · Jul 23, 2024 · 2df58bb · 2df58bb
1 parent 050030b
commit 2df58bb
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/Engine/DataFeeds/DataQueueHandlerManager.cs b/Engine/DataFeeds/DataQueueHandlerManager.cs
@@ -207,7 +207,14 @@ public IEnumerable<Symbol> LookupSymbols(Symbol symbol, bool includeExpired, str
         {
             foreach (var dataHandler in GetUniverseProviders())
             {
-                var result = dataHandler.LookupSymbols(symbol, includeExpired, securityCurrency).ToList();
+                var symbols = dataHandler.LookupSymbols(symbol, includeExpired, securityCurrency);
+                if (symbols == null)
+                {
+                    // the universe provider does not support it
+                    continue;
+                }
+
+                var result = symbols.ToList();
                 if (result.Any())
                 {
                     return result;