Public bug reported:
trusty's dpkg (1.17.5ubuntu5.7) cannot handle .deb files that contain
control.tar files that are compressed using the xz compressor.
Here's an example of such a case when trying to show the contents of a
.deb file from bionic's repositories:
dpkg-deb: error: archive './var/cache/apt/archives/ubuntu-
minimal_1.406_amd64.deb' has premature member 'control.tar.xz' before
'control.tar.gz', giving up
This issue makes it currently impossible to create a bionic environment
using debootstrap (currently from trusty-proposed).
I have observed the issue on trusty, precisely on
$ lsb_release -rd
Description: Ubuntu 14.04.5 LTS
Release: 14.04
using
$ apt-cache policy dpkg
dpkg:
Installed: 1.17.5ubuntu5.7
Candidate: 1.17.5ubuntu5.7
Version table:
*** 1.17.5ubuntu5.7 0
500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty-updates/main amd64
Packages
100 /var/lib/dpkg/status
1.17.5ubuntu5.6 0
500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64
Packages
1.17.5ubuntu5 0
500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty/main amd64 Packages
** Affects: dpkg (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1730627
Title:
xz compressed control.tar files not supported
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