> The only reliable way of knowing if a given version of a xz decompressor can decompress a given file is by trial and error. The 'file' utility does not provid

> The only reliable way of knowing if a given version of a xz decompressor can decompress a given file is by trial and error. The 'file' utility does not provide any help: $ file COPYING.* COPYING.lz: lzip compressed data, version: 1 COPYING.xz: XZ compressed data To me, this indicates a lack of data in the magic database used by file, more than something inherently bad with xz.