Making forward progress.

1 files changed, 3 insertions, 0 deletions

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