# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1518659692 -3600
# Node ID e7808f8d7d11e495970b6b637bf221136cb3502a
# Parent  0de0018bdf91defb3fcfb578f9da5ce26017d052
MUC: Prevent traceback in case of no history items to serialize (fixes #1083)

diff -r 0de0018bdf91 -r e7808f8d7d11 plugins/muc/muc.lib.lua
--- a/plugins/muc/muc.lib.lua	Sun Feb 04 01:40:11 2018 +0100
+++ b/plugins/muc/muc.lib.lua	Thu Feb 15 02:54:52 2018 +0100
@@ -1378,7 +1378,7 @@
 			end
 		end
 		local history = self._history;
-		if history then
+		if history and history[1] ~= nil then
 			state._last_message = st.preserialize(history[#history].stanza);
 			state._last_message_at = history[#history].timestamp;
 		end