From eb231a2aad42053bf89fdc3c39b54b0cfc400935 Mon Sep 17 00:00:00 2001
From: James Lu <james@overdrivenetworks.com>
Date: Sat, 20 Oct 2018 12:31:54 -0700
Subject: [PATCH] classes: always raise an error if make_channel_ban creates
 something invalid

---
 classes.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/classes.py b/classes.py
index 1efa48d..342a9dd 100644
--- a/classes.py
+++ b/classes.py
@@ -1412,7 +1412,8 @@ class PyLinkNetworkCoreWithUtils(PyLinkNetworkCore):
 
         template = string.Template(ban_style)
         banhost = template.safe_substitute(self.users[uid].get_fields())
-        assert self.is_hostmask(banhost), "Ban mask %r is not a valid hostmask!" % banhost
+        if not self.is_hostmask(banhost):
+            raise ValueError("Ban mask %r is not a valid hostmask!" % banhost)
 
         if ban_type in self.cmodes:
             return ('+%s' % self.cmodes[ban_type], banhost)