From dd04def10f22296c9a98b4d796c100b9ad4e2388 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Fri, 21 Jul 2023 21:07:04 -0700
Subject: [PATCH] Try to fix NoMethodError on update-deps

---
 tool/update-deps | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tool/update-deps b/tool/update-deps
index 86e359c0d0..c79a8a61c5 100755
--- a/tool/update-deps
+++ b/tool/update-deps
@@ -480,7 +480,7 @@ def compare_deps(make_deps, cc_deps, out=$stdout)
     }
   }
 
-  makefiles.keys.sort.each {|makefile|
+  makefiles.keys.compact.sort.each {|makefile|
     cc_lines = cc_lines_hash[makefile] || Hash.new(false)
     make_lines = make_lines_hash[makefile] || Hash.new(false)
     content = begin