diff -r d16c9dba9337 -r 7c95aba75a55 plugins/pubsub2room.lua
--- a/plugins/pubsub2room.lua	Sun May 20 01:49:58 2018 +0200
+++ b/plugins/pubsub2room.lua	Sun May 20 01:57:58 2018 +0200
@@ -36,7 +36,8 @@
 };
 
 local function new_extractor(stanza, data)
-	return stanza and setmetatable({ stanza = stanza, data = data }, extractor_mt) or nil;
+	if not stanza then return nil end
+	return setmetatable({ stanza = stanza, data = data }, extractor_mt);
 end
 
 local last_message_time = 0;