From af50f71224b72439b083eff348e424da696b3095 Mon Sep 17 00:00:00 2001
From: Tristan Hume <tristan.hume@jadedpixel.com>
Date: Fri, 30 Aug 2013 15:26:26 -0400
Subject: [PATCH] Guard against state that shouldn't happen but does

---
 lib/liquid/block.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/liquid/block.rb b/lib/liquid/block.rb
index ed7f7ac..4a210d7 100644
--- a/lib/liquid/block.rb
+++ b/lib/liquid/block.rb
@@ -67,7 +67,7 @@ module Liquid
       all_warnings = []
       all_warnings.concat(@warnings) if @warnings
 
-      @children.each do |node|
+      (@children || []).each do |node|
         all_warnings.concat(node.warnings || [])
       end