Issue #7412 has been updated by ko1 (Koichi Sasada). ping -> akr ---------------------------------------- Feature #7412: Pathname#relative_path_from does not support mixed directory separators on windows https://bugs.ruby-lang.org/issues/7412#change-36908 Author: 7er (Syver Enstad) Status: Assigned Priority: Normal Assignee: akr (Akira Tanaka) Category: lib Target version: 2.0.0 =begin The support for mixing backslashes and forward slashes in the pathname module in the standard library seems to be broken on windows require 'pathname' base = Pathname.new("c:\\") filepath = Pathname.new("c:/foo/bar/file.ext") base.relative_path_from(filepath) raises `ArgumentError: different prefix: "c:\\" and "c:/foo/bar/file.ext"` Changing filepath to contain backslashes fixes the problem filepath = Pathname.new("c:\\foo\\bar\\file.ext") base.relative_path_from(filepath) `=> #<Pathname:../../..>` =end -- http://bugs.ruby-lang.org/