From f4cd21e4e07ab80a0fc7a235400509e87e3e64e7 Mon Sep 17 00:00:00 2001
From: fedeb <federico.buonco@gmail.com>
Date: Sat, 7 Nov 2020 21:15:26 +0100
Subject: [PATCH] Another check if a given topic has just the :list and
 rosetta/

---
 lib/routing.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/routing.py b/lib/routing.py
index d8ac53c..6be5269 100644
--- a/lib/routing.py
+++ b/lib/routing.py
@@ -119,6 +119,9 @@ class Router(object):
             #Here we remove the special cases
             if ":list" in topic_list: topic_list.remove(":list")
             if "rosetta/" in topic_list: topic_list.remove("rosetta/")
+            #Here we still check that topic_list in not empty
+            if not topic_list:
+                return prefix
             random_topic = random.choice(topic_list)
             return prefix + random_topic