Revert "[rubygems/rubygems] Fix require issue with file extension priority"

This reverts commit d767da428c.

  It fails with spec/ruby/core/kernel/require_spec.rb:5

lib/rubygems/core_ext/kernel_require.rb

@@ -43,18 +43,18 @@ module Kernel
     # https://github.com/rubygems/rubygems/pull/1868
     resolved_path = begin
       rp = nil
-      Gem.suffixes.each do |s|
+      $LOAD_PATH[0...Gem.load_path_insert_index || -1].each do |lp|
-        $LOAD_PATH[0...Gem.load_path_insert_index || -1].each do |lp|
+        safe_lp = lp.dup.tap(&Gem::UNTAINT)
-          safe_lp = lp.dup.tap(&Gem::UNTAINT)
+        begin
-          begin
+          if File.symlink? safe_lp # for backward compatibility
-            if File.symlink? safe_lp # for backward compatibility
+            next
-              next
-            end
-          rescue SecurityError
-            RUBYGEMS_ACTIVATION_MONITOR.exit
-            raise
           end
+        rescue SecurityError
+          RUBYGEMS_ACTIVATION_MONITOR.exit
+          raise
+        end
 
+        Gem.suffixes.each do |s|
           full_path = File.expand_path(File.join(safe_lp, "#{path}#{s}"))
           if File.file?(full_path)
             rp = full_path
@@ -67,8 +67,12 @@ module Kernel
     end
 
     if resolved_path
-      RUBYGEMS_ACTIVATION_MONITOR.exit
+      begin
-      return gem_original_require(resolved_path)
+        RUBYGEMS_ACTIVATION_MONITOR.exit
+        return gem_original_require(resolved_path)
+      rescue LoadError
+        RUBYGEMS_ACTIVATION_MONITOR.enter
+      end
     end
 
     if spec = Gem.find_unresolved_default_spec(path)

test/rubygems/test_require.rb

@@ -120,24 +120,6 @@ class TestGemRequire < Gem::TestCase
     Object.send :remove_const, :HELLO if Object.const_defined? :HELLO
   end
 
-  def test_dash_i_respects_default_library_extension_priority
-    skip "extensions don't quite work on jruby" if Gem.java_platform?
-
-    dash_i_ext_arg = util_install_extension_file('a')
-    dash_i_lib_arg = util_install_ruby_file('a')
-
-    lp = $LOAD_PATH.dup
-
-    begin
-      $LOAD_PATH.unshift dash_i_lib_arg
-      $LOAD_PATH.unshift dash_i_ext_arg
-      assert_require 'a'
-      assert_match(/a\.rb$/, $LOADED_FEATURES.last)
-    ensure
-      $LOAD_PATH.replace lp
-    end
-  end
-
   def test_concurrent_require
     Object.const_set :FILE_ENTERED_LATCH, Latch.new(2)
     Object.const_set :FILE_EXIT_LATCH, Latch.new(1)
@@ -559,48 +541,4 @@ class TestGemRequire < Gem::TestCase
     $VERBOSE = old_verbose
   end
 
-  def util_install_extension_file(name)
-    spec = quick_gem name
-    util_build_gem spec
-
-    spec.extensions << "extconf.rb"
-    write_file File.join(@tempdir, "extconf.rb") do |io|
-      io.write <<-RUBY
-        require "mkmf"
-        create_makefile("#{name}")
-      RUBY
-    end
-
-    write_file File.join(@tempdir, "#{name}.c") do |io|
-      io.write <<-C
-        #include <ruby.h>
-        void Init_#{name}() { }
-      C
-    end
-
-    spec.files += ["extconf.rb", "#{name}.c"]
-
-    so = File.join(spec.gem_dir, "#{name}.#{RbConfig::CONFIG["DLEXT"]}")
-    refute_path_exists so
-
-    path = Gem::Package.build spec
-    installer = Gem::Installer.at path
-    installer.install
-    assert_path_exists so
-
-    spec.gem_dir
-  end
-
-  def util_install_ruby_file(name)
-    dir_lib = Dir.mktmpdir("test_require_lib", @tempdir)
-    dash_i_lib_arg = File.join dir_lib
-
-    a_rb = File.join dash_i_lib_arg, "#{name}.rb"
-
-    FileUtils.mkdir_p File.dirname a_rb
-    File.open(a_rb, 'w') { |f| f.write "# #{name}.rb" }
-
-    dash_i_lib_arg
-  end
-
 end