Description:
------------
See bug 43137. The same bug applies to Windows.

Given a directory structure "C:\Test\Test2" with no files in either directory,
rmdir("C:\Test\Test2") succeeds
but subsequent
rmdir("C:\Test") fails with "directory not empty", even though it is empty.
Running clearstatcache() prior to rmdir("C:\Test") works around the problem.

Test script:
---------------
if (file_exists("C:\Test\Test2")) rmdir("C:\Test\Test2");
rmdir("C:\Test")

Expected result:
----------------
c:\Test\Test2 is deleted
C:\Test is deleted
No warnings

Actual result:
--------------
C:\Test\Test2 is deleted
C:\Test is NOT deleted
Receive warning that C:\Test is not empty