Description:
------------
The test script creates a test directory, and 5 text files inside. It then uses loads those files into a PharData file, compresses it, and extracts to a "dest" directory. In php 7.0.15, the files had the correct contents, in 7.0.16, the files in "dest" are empty.

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

`rm -rf test`;
mkdir('test');
file_put_contents('test/1.txt', str_repeat('h', 10000));
file_put_contents('test/2.txt', str_repeat('e', 10000));
file_put_contents('test/3.txt', str_repeat('l', 10000));
file_put_contents('test/4.txt', str_repeat('l', 10000));
file_put_contents('test/5.txt', str_repeat('o', 10000));
$phar = new PharData('test.tar');
$phar->buildFromDirectory('test');
$compPhar = $phar->compress(Phar::GZ);
unset($phar); //make sure that test.tar is closed
unlink('test.tar');
unset($compPhar); //make sure that test.tar.gz is closed
$extractingPhar = new PharData('test.tar.gz');
$extractingPhar->extractTo('dest');