From 0f1b3c6260b842ce61026efe7fb077de55800a26 Mon Sep 17 00:00:00 2001
From: Buckaroo Banzai <39065740+BuckarooBanzay@users.noreply.github.com>
Date: Fri, 30 Oct 2020 15:04:18 +0100
Subject: [PATCH] check field arg for nil

---
 util/normalize.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/util/normalize.lua b/util/normalize.lua
index 4ceaddb..7dcec4a 100644
--- a/util/normalize.lua
+++ b/util/normalize.lua
@@ -14,6 +14,10 @@ end
 
 
 function mail.parse_player_list(field)
+    if not field then
+        return {}
+    end
+
     local separator = ", "
     local pattern = "([^" .. separator .. "]+)"