From 9a8a8437249792b8d230e36c4bf2855f5607cc9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonah=20Br=C3=BCchert?= <jbb@kaidan.im>
Date: Sat, 2 Jul 2022 20:20:24 +0200
Subject: [PATCH] Fix filter_nodes

The previous implementation always returned an empty list while testing
it. However I don't really understand why that happened. The list
comprehension based one works, although it looks equivalent to me.
---
 src/mod_mix.erl | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/mod_mix.erl b/src/mod_mix.erl
index 256715af0..315c7b80d 100644
--- a/src/mod_mix.erl
+++ b/src/mod_mix.erl
@@ -593,10 +593,8 @@ known_nodes() ->
 
 -spec filter_nodes([binary()]) -> [binary()].
 filter_nodes(Nodes) ->
-    lists:filter(
-      fun(Node) ->
-	      lists:member(Node, Nodes)
-      end, known_nodes()).
+    KnownNodes = known_nodes(),
+    [Node || KnownNode <- KnownNodes, Node <- Nodes, KnownNode == Node].
 
 -spec multicast(module(), binary(), binary(),
 		binary(), binary(), fun((jid()) -> message())) -> ok.