From cd12dfd38888cc3d3f4696146d154da15412bc93 Mon Sep 17 00:00:00 2001
From: Ellen Marie Dash <me@duckie.co>
Date: Tue, 30 Jan 2024 18:31:05 -0500
Subject: [PATCH] [rubygems/rubygems] [rebuild_command] Avoid leaking files.

https://github.com/rubygems/rubygems/commit/3b88553d0d
---
 lib/rubygems/commands/rebuild_command.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/rubygems/commands/rebuild_command.rb b/lib/rubygems/commands/rebuild_command.rb
index 731d14328c..234d0af856 100644
--- a/lib/rubygems/commands/rebuild_command.rb
+++ b/lib/rubygems/commands/rebuild_command.rb
@@ -120,8 +120,10 @@ An example of reproducing a gem build:
 
   def get_timestamp(file)
     mtime = nil
-    Gem::Package::TarReader.new(File.open(file)) do |tar|
-      mtime = tar.seek("metadata.gz") {|f| f.header.mtime }
+    File.open(file, "rb") do |f|
+      Gem::Package::TarReader.new(f) do |tar|
+        mtime = tar.seek("metadata.gz") {|tf| tf.header.mtime }
+      end
     end
 
     mtime