From 10d61df78bdbf002a3701e468b0a3c88be2cad03 Mon Sep 17 00:00:00 2001
From: Bruce Hill <bitbucket@bruce-hill.com>
Date: Tue, 26 Sep 2017 15:27:01 -0700
Subject: Making forward progress.

---
 utils.lua | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'utils.lua')

diff --git a/utils.lua b/utils.lua
index 84a0b54..2f6f25a 100644
--- a/utils.lua
+++ b/utils.lua
@@ -1,6 +1,9 @@
 local utils
 utils = {
   is_list = function(t)
+    if type(t) ~= 'table' then
+      return false
+    end
     local i = 1
     for _ in pairs(t) do
       if t[i] == nil then
-- 
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