Merge RubyGems 2.7.7

  see release details here: https://blog.rubygems.org/2018/05/18/2.7.7-released.html

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63461 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/rubygems/bundler_version_finder.rb b/lib/rubygems/bundler_version_finder.rb
index baca170840..2f448c9562 100644
--- a/lib/rubygems/bundler_version_finder.rb
+++ b/lib/rubygems/bundler_version_finder.rb
@@ -1,3 +1,7 @@
+# frozen_string_literal: true
+
+require "rubygems/util"
+
 module Gem::BundlerVersionFinder
   @without_filtering = false
 
@@ -102,7 +106,7 @@ To install the missing version, run `gem install bundler:#{vr.first}`
     lockfile = case gemfile
     when "gems.rb" then "gems.locked"
     else "#{gemfile}.lock"
-    end.untaint
+    end.dup.untaint
 
     return unless File.file?(lockfile)