From 61afbed17a4ad9af6024854b2ec32bfb7f330682 Mon Sep 17 00:00:00 2001
From: Erez Shinan <erezshin+git@gmail.com>
Date: Sat, 7 Apr 2018 15:17:37 +0300
Subject: [PATCH] A minor style fix (a possible memory usage improvement)

---
 lark/parsers/grammar_analysis.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lark/parsers/grammar_analysis.py b/lark/parsers/grammar_analysis.py
index 5cbd697..f34d5c1 100644
--- a/lark/parsers/grammar_analysis.py
+++ b/lark/parsers/grammar_analysis.py
@@ -136,7 +136,8 @@ class GrammarAnalyzer(object):
                     if not is_terminal(new_r):
                         yield new_r
 
-        _ = list(bfs([rule], _expand_rule))
+        for _ in bfs([rule], _expand_rule):
+            pass
 
         return fzset(init_ptrs)