From e7f20a1953b3f1cf55d39ea0b8161993f0cf31f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=B1=A1=E9=81=93?= <w.kejia@gmail.com>
Date: Tue, 30 May 2017 04:07:24 -0400
Subject: [PATCH] Update ast.py

---
 shopify_python/ast.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/shopify_python/ast.py b/shopify_python/ast.py
index ea8f516..06a49ec 100644
--- a/shopify_python/ast.py
+++ b/shopify_python/ast.py
@@ -2,7 +2,7 @@
 
 
 def count_tree_size(node):  # type: (astroid.NodeNG) -> int
-    size = 1
+    size = 1 if node else 0
     for child in node.get_children():
         size += count_tree_size(child)
     return size