The ensure in postorder_traverse was added for [Bug #6756]. The intention was to try to delete the parent directory if it failed to get the children. (It may be possible to delete the directory if it is empty.) However, the ensure region rescue'ed not only "failure to get children" but also "failure to delete each child". Thus, the following raised Errno::ENOTEMPTY, but we expect it to raise Errno::EACCES. ``` $ mkdir foo $ touch foo/bar $ chmod 555 foo $ ruby -rfileutils -e 'FileUtils.rm_rf("foo")' ``` This changeset narrows the ensure region so that it rescues only "failure to get children". https://.com/ruby/fileutils/commit/ec5d3b84ea