rmdir that should succeed fails (MacOS only)

[agroce]

import shutil
import pyfakefs.fake_filesystem
import os

ROOT_PATH = "/Volumes/ramdisk/test"

fs = pyfakefs.fake_filesystem.FakeFilesystem()
fs.CreateDirectory('/Volumes')
fs.CreateDirectory('/Volumes/ramdisk')
fs.CreateDirectory('/Volumes/ramdisk/test')
os0 = pyfakefs.fake_filesystem.FakeOsModule(fs)
opener0 = pyfakefs.fake_filesystem.FakeFileOpen(fs)

if False:
    os0 = os
    shutil.rmtree(ROOT_PATH)
    os.mkdir(ROOT_PATH)
    opener0 = open

component0 = "alpha" 
component1 = "" 
path0 = ROOT_PATH 
path1 = ROOT_PATH 
path0 += os.path.sep + component0 
component0 = "beta" 
path1 += os.path.sep + component0 
os0.mkdir(path1) 
os0.symlink(path1,path0) 
path0 += os.path.sep + component1 
os0.rmdir(path0) 

[mrbean-bremen]

Pyfakefs correctly raises OSError 20 under Linux and no error under Windows, but raises OSError 20 under MacOS where it should not raise.