Patch by: yuuji.yaginuma <yuuji.yaginuma@gmail.com> https://github.com/ruby/ruby/pull/1900 [Fix GH-1900] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63775 b2dd03c8-39d4-4d8f-98ff-823fe69b080e