# Recursively delete a directory and all of its content
	#
	# Does not go through symbolic links and may get stuck in a cycle if there
	# is a cycle in the file system.
	#
	# `last_error` is updated with the first encountered error, or null on success.
	# The method does not stop on the first error and tries to remove the most files and directories.
	#
	# ~~~
	# var path = "/does/not/exists/".to_path
	# path.rmdir
	# assert path.last_error != null
	#
	# path = "/tmp/path/to/create".to_path
	# path.to_s.mkdir
	# assert path.exists
	# path.rmdir
	# assert path.last_error == null
	# ~~~
	fun rmdir
	do
		var first_error = null
		for file in self.files do
			var stat = file.link_stat
			if stat == null then
				if first_error == null then first_error = file.last_error
				continue
			end
			if stat.is_dir then
				# Recursively rmdir
				file.rmdir
			else
				file.delete
			end
			if first_error == null then first_error = file.last_error
		end

		# Delete the directory itself if things are fine
		if first_error == null then
			if not path.to_cstring.rmdir then
				first_error = new IOError("Cannot remove `{self}`: {sys.errno.strerror}")
			end
		end
		self.last_error = first_error
	end