Under only Windows XP the test FileSystemWatcherTestCase::TestTrees fails
during the RmDir(treedir) call (SHFileOperation strangely returns
ERROR_DIR_NOT_EMPTY). To make the test pass remove the treedir first and
only then the singledir. This is merely a workaround while the actual
problem is still to be investigated.
This is the backport of 2d5ce25373
from
master.