https://git.ruby-lang.org/ruby.git/commit/?id=d041c6cebb

From d041c6cebbe7fe973789616bef43200213e1a001 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Sat, 17 Aug 2019 12:35:30 +0900
Subject: Added comments for extended require by RubyGems


diff --git a/lib/rubygems/core_ext/kernel_require.rb b/lib/rubygems/core_ext/kernel_require.rb
index cc7ec7e..b4aebf8 100755
--- a/lib/rubygems/core_ext/kernel_require.rb
+++ b/lib/rubygems/core_ext/kernel_require.rb
@@ -36,11 +36,13 @@ module Kernel https://github.com/ruby/ruby/blob/trunk/lib/rubygems/core_ext/kernel_require.rb#L36
 
     path = path.to_path if path.respond_to? :to_path
 
+    # Ensure -I beats a default gem
+    # https://github.com/rubygems/rubygems/pull/1868
     resolved_path = begin
       rp = nil
       $LOAD_PATH[0...Gem.load_path_insert_index].each do |lp|
         safe_lp = lp.dup.untaint
-        next if File.symlink? safe_lp
+        next if File.symlink? safe_lp # for backword compatibility
         Gem.suffixes.each do |s|
           full_path = File.expand_path(File.join(safe_lp, "#{path}#{s}"))
           if File.file?(full_path)
-- 
cgit v0.10.2


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