[php-src] Issue #24170: bzip2.decompress stream wrapper truncates valid bz2 files from pbzip2

Issue: https://github.com/php/php-src/issues/24170 Author: ftzdomino ### Description pbzip2 slices a file into 900000 byte blocks and then concatenates the streams. The default PHP behavior for using libbzip2 stops after the first concatenated stream without warning. This results in silently truncated reads. The following code: ```php <?php $f = tempnam(sys_get_temp_dir(), 'bz'); file_put_contents($f, bzcompress(str_repeat('a', 900000)) . bzcompress('tail')); // two streams echo strlen(file_get_contents("compress.bzip2://$f")), "\n"; // 900000 if truncated, 900004 if not $fp = fopen($f, 'rb'); stream_filter_append($fp, 'bzip2.decompress', STREAM_FILTER_READ, ['concatenated' => true]); echo strlen(stream_get_contents($fp)), "\n"; // 900004 ``` Resulted in this output: ``` 900000 900004 ``` But I expected this output instead: ``` 900004 900004 ``` ### PHP Version ```plain PHP 8.5.11 (cli) (built: Sep 24 2026 14:38:36) (NTS) Copyright (c) The PHP Group Built by Debian Zend Engine v4.5.11, Copyright (c) Zend Technologies with Zend OPcache v8.5.11, Copyright (c), by Zend Technologies ``` ### Operating System Debian 12.15