Description:
------------
When two RecursiveFilterIterator are added to RecursiveDirectoryIterator it results in a segfault. The same code works in PHP 7.2.x and below

Test script:
---------------
<?php

mkdir("/tmp/dir");
mkdir("/tmp/dir/subdir");
touch("/tmp/dir/file1");
touch("/tmp/dir/subdir/file2");

class Filter1 extends RecursiveFilterIterator {
    public function accept() { return $this->getInnerIterator()->getSubPathname() != ''; }
}

class Filter2 extends RecursiveFilterIterator {
    public function accept() { return $this->getInnerIterator()->getSubPathname() != ' '; }
}

$iterator = new RecursiveDirectoryIterator( '/tmp', FilesystemIterator::SKIP_DOTS );

$iterator = new Filter1( $iterator );

$iterator = new Filter2( $iterator );

$iterator = new RecursiveIteratorIterator( $iterator, RecursiveIteratorIterator::LEAVES_ONLY, RecursiveIteratorIterator::CATCH_GET_CHILD );

foreach ( $iterator as $item ) {
    echo  $iterator->getSubPathName() . PHP_EOL;
}

Expected result:
----------------
dir/file1
dir/subdir/file2

Actual result:
--------------
dir/file1

Process exited with code 139.