https://git.ruby-lang.org/ruby.git/commit/?id=260ef51a73

From 260ef51a73c067599826c8ab110c53994c1b6226 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Sat, 17 Aug 2019 12:33:38 +0900
Subject: `Gem.load_path_insert_index always returns non-nil index after Ruby
 1.9


diff --git a/lib/rubygems/core_ext/kernel_require.rb b/lib/rubygems/core_ext/kernel_require.rb
index d121d82..cc7ec7e 100755
--- a/lib/rubygems/core_ext/kernel_require.rb
+++ b/lib/rubygems/core_ext/kernel_require.rb
@@ -38,7 +38,7 @@ module Kernel https://github.com/ruby/ruby/blob/trunk/lib/rubygems/core_ext/kernel_require.rb#L38
 
     resolved_path = begin
       rp = nil
-      $LOAD_PATH[0...Gem.load_path_insert_index || -1].each do |lp|
+      $LOAD_PATH[0...Gem.load_path_insert_index].each do |lp|
         safe_lp = lp.dup.untaint
         next if File.symlink? safe_lp
         Gem.suffixes.each do |s|
-- 
cgit v0.10.2


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