Fix remove_entry error when path encoding is not compatible UTF-8

lib/fileutils.rb

@@ -1287,7 +1287,11 @@ module FileUtils
 
     def entries
       opts = {}
-      opts[:encoding] = fu_windows? ? ::Encoding::UTF_8 : path.encoding
+      if fu_windows? && ::Encoding.compatible?(::Encoding::UTF_8, path.encoding)
+        opts[:encoding] = ::Encoding::UTF_8
+      else
+        opts[:encoding] = path.encoding
+      end
 
       files = if Dir.respond_to?(:children)
         Dir.children(path, **opts)

test/fileutils/test_fileutils.rb

@@ -756,6 +756,23 @@ class TestFileUtils < Test::Unit::TestCase
     assert_file_not_exist dir
   end
 
+  def test_remove_entry_multibyte_path
+    c = "\u00a7"
+    begin
+      c = c.encode('filesystem')
+    rescue EncodingError
+      c = c.b
+    end
+    dir = "tmpdir#{c}"
+    my_rm_rf dir
+
+    Dir.mkdir dir
+    File.write("#{dir}/#{c}.txt", "test_remove_entry_multibyte_path")
+
+    remove_entry dir
+    assert_file_not_exist dir
+  end
+
   def test_remove_entry_secure
     check_singleton :remove_entry_secure