* Throw InvalidOperationException in the case of a bug.

Author: lukebakken

projects/RabbitMQ.Client/client/api/IEndpointResolverExtensions.cs

@@ -71,9 +71,16 @@ public static async Task<T> SelectOneAsync<T>(this IEndpointResolver resolver,
                 }
             }
 
-            if (EqualityComparer<T>.Default.Equals(t!, default!) && exceptions.Count > 0)
+            if (EqualityComparer<T>.Default.Equals(t!, default!))
             {
-                throw new AggregateException(exceptions);
+                if (exceptions.Count > 0)
+                {
+                    throw new AggregateException(exceptions);
+                }
+                else
+                {
+                    throw new InvalidOperationException(InternalConstants.BugFound);
+                }
             }
 
             return t!;

projects/RabbitMQ.Client/client/api/InternalConstants.cs

@@ -51,5 +51,7 @@ internal static class InternalConstants
         /// https://github.com/rabbitmq/rabbitmq-dotnet-client/issues/980
         /// </summary>
         internal const int DefaultRabbitMqMaxClientProvideNameLength = 3000;
+
+        internal const string BugFound = "BUG FOUND - please report this exception (with stacktrace) here: https://github.com/rabbitmq/rabbitmq-dotnet-client/issues";
     }
 }