Ruby

abs = Pathname.new("/abs/dir") my = Pathname.new("/my/path") # actual my/abs # => #<Pathname:/abs/dir> # expected my/abs # => #<Pathname:/my/dir/abs/dir> 

While this behavior is desirable in #expand_path, here I believe it is very surprising.

I am happy to submit a patch for this should it be confirmed as a bug.