From 8f38d0b0176052d6de13ec17223f1fcab3048cfe Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Tue, 14 Jun 2022 23:01:05 -0400
Subject: [PATCH] Clean up ItemSet#close!

---
 lib/propane/parser/item_set.rb | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/lib/propane/parser/item_set.rb b/lib/propane/parser/item_set.rb
index df85c41..6c2df31 100644
--- a/lib/propane/parser/item_set.rb
+++ b/lib/propane/parser/item_set.rb
@@ -110,15 +110,13 @@ class Propane
       #
       # @return [void]
       def close!
-        eval_items = @items
+        eval_items = @items.dup
         while eval_items.size > 0
-          this_eval_items = eval_items
-          eval_items = Set.new
-          this_eval_items.each do |item|
-            item.closed_items.each do |new_item|
-              unless @items.include?(new_item)
-                eval_items << new_item
-              end
+          item = eval_items.first
+          eval_items.delete(item)
+          item.closed_items.each do |new_item|
+            unless @items.include?(new_item)
+              eval_items << new_item
             end
           end
           @items += eval_items