From 6eb0c63e0de166776d590e4d65cc85c376226000 Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Sun, 29 Jul 2018 00:17:41 +0200
Subject: util.serialization: Tighten up type checks

---
 util/serialization.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'util/serialization.lua')

diff --git a/util/serialization.lua b/util/serialization.lua
index 74d83a50..960794f2 100644
--- a/util/serialization.lua
+++ b/util/serialization.lua
@@ -151,9 +151,9 @@ local function new(opt)
 			elseif mt then
 				tag = mt.__type;
 			end
-			if fr then
+			if type(fr) == "function" then
 				t = fr(t);
-				if tag then
+				if type(tag) == "string" then
 					o[l], l = tag, l + 1;
 				end
 			end
-- 
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