autopkgtest unshare-qemuwrapper failing on amd64

[Miriam España Acebal]

While watching Noble openssh migration, I saw this test failing and marking amd64 as regression.

Log : https://objectstorage.prodstack5.canonical.com/swift/v1/AUTH_0f9aae918d5b4744bf7b827671c86842/autopkgtest-noble/noble/amd64/s/sbuild/20240201_000224_2a4c6@/log.gz

Relevant part of the log:

1565s Chrooting into /tmp/mmdebstrap.bsT6cbiWIs/
1565s Setting up cpio (2.15+dfsg-1) ...
1565s update-alternatives: error: alternative path /bin/mt-gnu doesn't exist
1565s dpkg: error processing package cpio (--configure):
1565s installed cpio package post-installation script subprocess returned error exit status 2

It can be reproduced locally, too.

The most recent test working is from 01/08/2024:
https://autopkgtest.ubuntu.com/results/autopkgtest-noble/noble/amd64/s/sbuild/20240108_203545_af566@/log.gz

The cpio version in the immediately log above is lower. The same (working) part is:

2188s Chrooting into /tmp/mmdebstrap.qSEp1fU8f3/
2188s Setting up cpio (2.14+dfsg-1) ...
2188s update-alternatives: using /bin/mt-gnu to provide /bin/mt (mt) in auto mode

cpio diff : https://launchpadlibrarian.net/709448424/cpio_2.14+dfsg-1_2.15+dfsg-1.diff.gz

[Miriam España Acebal (mirespace)]

Patch has been forwarded to Debian.

Added the Debian bug I created for tracking.

[Launchpad Janitor (janitor)]

This bug was fixed in the package cpio - 2.15+dfsg-1ubuntu1

---------------
cpio (2.15+dfsg-1ubuntu1) noble; urgency=medium

  * d/prerm, d/postinst: fix path according to /usr movement (LP: #2052295)

 -- Miriam España Acebal <email address hidden> Fri, 02 Feb 2024 13:03:45 +0100

[Benjamin Drung (bdrung)]

This has been fixed in sbuild 0.85.6 via https://salsa.debian.org/debian/sbuild/-/merge_requests/57