https://git.ruby-lang.org/ruby.git/commit/?id=9736cb890b

From 9736cb890bb80924e7d1f3189232bfe60519bd29 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 27 Dec 2021 08:56:00 +0900
Subject: Check if `Kernel#untaint` is defined instead of version comparison

Probably `RUBY_VERSION` seems overwritten somewhere in the tests.
---
 lib/bundler/dsl.rb            |  2 +-
 lib/bundler/rubygems_ext.rb   |  2 +-
 lib/bundler/shared_helpers.rb | 10 +++++-----
 lib/bundler/source/git.rb     |  2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/lib/bundler/dsl.rb b/lib/bundler/dsl.rb
index f7922b1fba0..7b0db79de6b 100644
--- a/lib/bundler/dsl.rb
+++ b/lib/bundler/dsl.rb
@@ -46,7 +46,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/dsl.rb#L46
       @gemfile = expanded_gemfile_path
       @gemfiles << expanded_gemfile_path
       contents ||= Bundler.read_file(@gemfile.to_s)
-      instance_eval(contents.dup.tap{|x| x.untaint if RUBY_VERSION < "2.7" }, gemfile.to_s, 1)
+      instance_eval(contents.dup.tap{|x| x.untaint if Kernel.method_defined?(:untaint) }, gemfile.to_s, 1)
     rescue Exception => e # rubocop:disable Lint/RescueException
       message = "There was an error " \
         "#{e.is_a?(GemfileEvalError) ? "evaluating" : "parsing"} " \
diff --git a/lib/bundler/rubygems_ext.rb b/lib/bundler/rubygems_ext.rb
index 5d572aa73d6..97d1c957ca3 100644
--- a/lib/bundler/rubygems_ext.rb
+++ b/lib/bundler/rubygems_ext.rb
@@ -29,7 +29,7 @@ module Gem https://github.com/ruby/ruby/blob/trunk/lib/bundler/rubygems_ext.rb#L29
       # gems at that time, this method could be called inside another require,
       # thus raising with that constant being undefined. Better to check a method
       if source.respond_to?(:path) || (source.respond_to?(:bundler_plugin_api_source?) && source.bundler_plugin_api_source?)
-        Pathname.new(loaded_from).dirname.expand_path(source.root).to_s.tap{|x| x.untaint if RUBY_VERSION < "2.7" }
+        Pathname.new(loaded_from).dirname.expand_path(source.root).to_s.tap{|x| x.untaint if Kernel.method_defined?(:untaint) }
       else
         rg_full_gem_path
       end
diff --git a/lib/bundler/shared_helpers.rb b/lib/bundler/shared_helpers.rb
index e48010232a8..a9de1625aa7 100644
--- a/lib/bundler/shared_helpers.rb
+++ b/lib/bundler/shared_helpers.rb
@@ -13,13 +13,13 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/shared_helpers.rb#L13
     def root
       gemfile = find_gemfile
       raise GemfileNotFound, "Could not locate Gemfile" unless gemfile
-      Pathname.new(gemfile).tap{|x| x.untaint if RUBY_VERSION < "2.7" }.expand_path.parent
+      Pathname.new(gemfile).tap{|x| x.untaint if Kernel.method_defined?(:untaint) }.expand_path.parent
     end
 
     def default_gemfile
       gemfile = find_gemfile
       raise GemfileNotFound, "Could not locate Gemfile" unless gemfile
-      Pathname.new(gemfile).tap{|x| x.untaint if RUBY_VERSION < "2.7" }.expand_path
+      Pathname.new(gemfile).tap{|x| x.untaint if Kernel.method_defined?(:untaint) }.expand_path
     end
 
     def default_lockfile
@@ -28,7 +28,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/shared_helpers.rb#L28
       case gemfile.basename.to_s
       when "gems.rb" then Pathname.new(gemfile.sub(/.rb$/, ".locked"))
       else Pathname.new("#{gemfile}.lock")
-      end.tap{|x| x.untaint if RUBY_VERSION < "2.7" }
+      end.tap{|x| x.untaint if Kernel.method_defined?(:untaint) }
     end
 
     def default_bundle_dir
@@ -100,7 +100,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/shared_helpers.rb#L100
     #
     # @see {Bundler::PermissionError}
     def filesystem_access(path, action = :write, &block)
-      yield(path.dup.tap{|x| x.untaint if RUBY_VERSION < "2.7" })
+      yield(path.dup.tap{|x| x.untaint if Kernel.method_defined?(:untaint) })
     rescue Errno::EACCES
       raise PermissionError.new(path, action)
     rescue Errno::EAGAIN
@@ -236,7 +236,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/shared_helpers.rb#L236
 
     def search_up(*names)
       previous = nil
-      current  = File.expand_path(SharedHelpers.pwd).tap{|x| x.untaint if RUBY_VERSION < "2.7" }
+      current  = File.expand_path(SharedHelpers.pwd).tap{|x| x.untaint if Kernel.method_defined?(:untaint) }
 
       until !File.directory?(current) || current == previous
         if ENV["BUNDLER_SPEC_RUN"]
diff --git a/lib/bundler/source/git.rb b/lib/bundler/source/git.rb
index a41a2f23e96..35ae6329c7b 100644
--- a/lib/bundler/source/git.rb
+++ b/lib/bundler/source/git.rb
@@ -336,7 +336,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/source/git.rb#L336
 
       def load_gemspec(file)
         stub = Gem::StubSpecification.gemspec_stub(file, install_path.parent, install_path.parent)
-        stub.full_gem_path = Pathname.new(file).dirname.expand_path(root).to_s.tap{|x| x.untaint if RUBY_VERSION < "2.7" }
+        stub.full_gem_path = Pathname.new(file).dirname.expand_path(root).to_s.tap{|x| x.untaint if Kernel.method_defined?(:untaint) }
         StubSpecification.from_stub(stub)
       end
 
-- 
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