Package: debdelta Version: 0.55 Severity: grave Tags: patch Ever since dpkg 1.18.14 or 1.18.15 was released there haven't been too many usable debdeltas available for download. The reason being that debs that have their data component compressed in XZ format are now being done so in parallel, which produces a file that debdelta cannot reproduce.
For example, trying to create a debdelta results in: > $ debdelta -vv fluid-soundfont-gm_3.1-5_all.deb > fluid-soundfont-gm_3.1-5.1_all.deb /tmp/patch.debdelta > OLD: Package: fluid-soundfont-gm Version: 3.1-5 Architecture: all > Installed-Size: 145368 > NEW: Package: fluid-soundfont-gm Version: 3.1-5.1 Architecture: all > Installed-Size: 145169 > debdelta.conf says we will skip: [] > studying debian-binary of len 0kB > studying control.tar.gz of len 0kB > time lost so far in finding correspondence 0.00 > compute delta for 0 (1kB) and 1 (10kB) > delta is 7.57% of 1, speed: 1942kB /sec > studying data.tar.xz of len 116822kB > Tried XZ options but failed: --lzma2=dict=8MiB crc64 > Tried XZ options but failed: -9e crc64 > Tried XZ options but failed: -9 crc64 > Tried XZ options but failed: -6e crc64 > debdelta : Cannot guess XZ parameters (non retriable I have a patch which I will make available shortly... -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (990, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.7.0-1-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages debdelta depends on: ii binutils 2.27.51.20161118-2 ii bzip2 1.0.6-8 ii libbz2-1.0 1.0.6-8 ii libc6 2.24-5 ii python 2.7.11-2 ii zlib1g 1:1.2.8.dfsg-2+b3 Versions of packages debdelta recommends: ii bsdiff 4.3-19 ii gnupg-agent 2.1.15-9 ii gnupg2 2.1.15-9 ii lzma 9.22-2 ii python-apt 1.1.0~beta5 ii python-debian 0.1.29 ii xdelta 1.1.3-9.1 ii xdelta3 3.0.11-dfsg-1 ii xz-utils [lzma] 5.2.2-1.3 Versions of packages debdelta suggests: ii debdelta-doc 0.55+nmu1 -- no debconf information
