Description:
------------
I think this is similar to this bug - https://bugs.php.net/bug.php?id=55468 except I'm trying to delete directories but not sure why this happens. If i remove the line "rmdir(...)" then script completes successfully printing all empty directory names to output. Once the line "rmdir(...)" is added back, it breaks with the below stack trace.

I worked around this by saving all directory names, then removing directories after the foreach loop completed.

Test script:
---------------
function deleteAllEmptyUserDirectories($path){

	$iterator = new RecursiveDirectoryIterator($path);

	$iterator->setFlags(RecursiveDirectoryIterator::SKIP_DOTS);

	// Get directories only
	$directories = new ParentIterator($iterator);

	// Loop over directories and remove empty ones
	foreach (new RecursiveIteratorIterator($directories, RecursiveIteratorIterator::SELF_FIRST) as $dir) {
	    // Count the number of "children" from the main directory iterator
	    if (iterator_count($iterator->getChildren()) === 0) {
	        rmdir($dir->getPathname());
	    	echo "[ DELETE ] " . $dir->getPathname() . "\n";
	    }
	}
}

deleteAllEmptyUserDirectories("/home/me/somedir/content");

Expected result:
----------------
[ DELETE ] 0 | /home/me/somedir/content/test
[ DELETE ] 0 | /home/me/somedir/content/test2


Actual result:
--------------
[ DELETE ] 0 | /home/me/somedir/content/test
PHP Fatal error:  Uncaught exception 'UnexpectedValueException' with message 'RecursiveDirectoryIterator::__construct(/home/me/somedir/content/test): failed to open dir: No such file or directory' in /home/me/www/scripts/deleteAllEmptyUserDirectories.php:18
Stack trace:
#0 [internal function]: RecursiveDirectoryIterator->__construct('/home/me...', 4096)
#1 [internal function]: RecursiveDirectoryIterator->getChildren()
#2 /home/me/www/scripts/deleteAllEmptyUserDirectories.php(18): RecursiveFilterIterator->getChildren()
#3 /home/me/www/scripts/deleteAllEmptyUserDirectories.php(27): deleteAllEmptyUserDirectories('/home/me...')
#4 {main}
  thrown in /home/me/www/scripts/deleteAllEmptyUserDirectories.php on line 18