* load.c (features_index_add): use rb_str_subseq() to specify C string

position properly to fix require non ascii path.
  [ruby-core:53733] [Bug #8165]

* test/ruby/test_require.rb (TestRequire#test_require_nonascii_path):
  a test for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40135 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_require.rb

@@ -59,6 +59,27 @@ class TestRequire < Test::Unit::TestCase
     end
   end
 
+  def test_require_nonascii_path
+    bug8165 = '[ruby-core:53733] [Bug #8165]'
+    Dir.mktmpdir {|tmp|
+      encoding = /mswin|mingw/ =~ RUBY_PLATFORM ? 'filesystem' : 'UTF-8'
+      dir = "\u3042" * 5
+      begin
+        require_path = File.join(tmp, dir, 'foo.rb').encode(encoding)
+      rescue
+        skip "cannot convert path encoding to #{encoding}"
+      end
+      Dir.mkdir(File.dirname(require_path))
+      open(require_path, "wb") {}
+      assert_in_out_err([], <<-INPUT, %w(:ok), [], bug8165)
+        # coding: #{encoding}
+        $:.replace([IO::NULL] + $:.reject {|path| path !~ /\.ext/})
+        p :ok if require '#{require_path}'
+        p :ng if require '#{require_path}'
+      INPUT
+    }
+  end
+
   def test_require_path_home_1
     env_rubypath, env_home = ENV["RUBYPATH"], ENV["HOME"]
     pathname_too_long = /pathname too long \(ignored\).*\(LoadError\)/m