nogvl readdir make SEGV on Windows
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60770 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
nogvl readdir make SEGV on Windows
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60770 b2dd03c8-39d4-4d8f-98ff-823fe69b080e