> These are all unforked packages that Devuan uses directly from
> Debian.
> Please could you report this to Debian BTS?

autopkgtest runs very smoothly on my Ubuntu 20.04 creating
Debian sid qemu image as below.
I do not think I can reproduce this issue #461 on Debian.
What sequence of commands can reproduce #461 on Debian?
I strongly doubt existence of such a sequence of commands on Debian...
If there is no such sequence of command to reproduce #461,
then what should be reported to Debian BTS?? I have no idea.

Best regards, Ryutaroh

root@ryutaroh-CFSZ6-1L:~# autopkgtest-build-qemu sid /var/tmp/sid-amd64.img
Load spec file /tmp/tmp.CF2ZDdpRc8
Exec: ['qemu-img', 'create', '-f', 'raw', '/var/tmp/sid-amd64.img.raw', '25G']
Exec: ['parted', '-s', '/var/tmp/sid-amd64.img.raw', 'mklabel', 'msdos']
Exec: ['parted', '-m', '/var/tmp/sid-amd64.img.raw', 'print']
Exec: ['parted', '-s', '/var/tmp/sid-amd64.img.raw', 'mkpart', 'primary', 'ext2', '0%', '100%']
Exec: ['kpartx', '-asv', '/var/tmp/sid-amd64.img.raw']
remembering /dev/mapper/loop0p1 as root
Exec: ['/sbin/mkfs', '-t', 'ext4', '/dev/mapper/loop0p1']
Exec: ['mount', '/dev/mapper/loop0p1', '/tmp/tmpk19ak3rp']
Exec: ['debootstrap', '--variant', '-', 'sid', '/tmp/tmpk19ak3rp', 'http://deb.debian.org/debian']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'apt-get', 'update']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'apt-get', 'update']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'apt-get', '-y', '--no-show-progress', 'install', 'eatmydata']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'eatmydata', 'apt-get', 'update']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'eatmydata', 'apt-get', '-y', '--no-show-progress', 'install', 'linux-image-amd64', 'ifupdown']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'apt-get', 'clean']
Installing GRUB for BIOS
Exec: ['mount', '--bind', '/dev', '/tmp/tmpk19ak3rp/dev']
Exec: ['mount', '--bind', '/proc', '/tmp/tmpk19ak3rp/proc']
Exec: ['mount', '--bind', '/sys', '/tmp/tmpk19ak3rp/sys']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'apt-get', '-y', '--no-show-progress', 'install', 'grub-pc']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'grub-mkconfig', '-o', '/boot/grub/grub.cfg']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'grub-install', '--target=i386-pc', '--no-nvram', '--force-extra-removable', '--no-floppy', '--modules=part_msdos part_gpt', '--grub-mkdevicemap=/boot/grub/device.map', '/dev/loop0']
Exec: ['chroot', '/tmp/tmpk19ak3rp', 'sh', '-c', 'passwd --delete root\nuseradd --home-dir /home/user --create-home user\npasswd --delete user\necho host > /etc/hostname']
Exec: ['sh', '-c', 'rootdev=$(ls -1 /dev/mapper/loop* | sort | tail -1)\nuuid=$(blkid -c /dev/null -o value -s UUID $rootdev)\necho "UUID=$uuid / ext4 errors=remount-ro 0 1" > $ROOT/etc/fstab']
Exec: ['sh', '-c', '/usr/share/autopkgtest/setup-commands/setup-testbed $ROOT']
Exec: ['sh', '-c', '/bin/true $ROOT']
All went fine, cleaning up.
Exec: ['umount', '/tmp/tmpk19ak3rp/dev']
Exec: ['umount', '/tmp/tmpk19ak3rp/proc']
Exec: ['umount', '/tmp/tmpk19ak3rp/sys']
Exec: ['umount', '/tmp/tmpk19ak3rp']
Exec: ['kpartx', '-dsv', '/var/tmp/sid-amd64.img.raw']

root@ryutaroh-CFSZ6-1L:~# autopkgtest -B -o /var/tmp/thunderbird1 thunderbird -- qemu --ram-size=4096 /var/tmp/sid-amd64.img 
autopkgtest [18:47:07]: version 5.11ubuntu1
autopkgtest [18:47:07]: host ryutaroh-CFSZ6-1L; command line: /usr/bin/autopkgtest -B -o /var/tmp/thunderbird1 thunderbird -- qemu --ram-size=4096 /var/tmp/sid-amd64.img
autopkgtest [18:47:24]: testbed dpkg architecture: amd64
autopkgtest [18:47:26]: testbed running kernel: Linux 5.6.0-1-amd64 #1 SMP Debian 5.6.7-1 (2020-04-29)
autopkgtest [18:47:27]: @@@@@@@@@@@@@@@@@@@@ apt-source thunderbird
Get:1 http://deb.debian.org/debian sid/main thunderbird 1:68.8.0-1 (dsc) [8274 B]
Get:2 http://deb.debian.org/debian sid/main thunderbird 1:68.8.0-1 (tar) [1045 kB]
Get:3 http://deb.debian.org/debian sid/main thunderbird 1:68.8.0-1 (tar) [9838 kB]
Get:4 http://deb.debian.org/debian sid/main thunderbird 1:68.8.0-1 (tar) [357 MB]
Get:5 http://deb.debian.org/debian sid/main thunderbird 1:68.8.0-1 (diff) [547 kB]
gpgv: unknown type of key resource 'trustedkeys.kbx'
gpgv: keyblock resource '/home/user/.gnupg/trustedkeys.kbx': General error
gpgv: Signature made Wed May  6 09:29:17 2020 UTC
gpgv:                using RSA key B70DFC6F134FECFC011E62AA83016014251D1DB0
gpgv: Can't check signature: No public key
dpkg-source: warning: failed to verify signature on ./thunderbird_68.8.0-1.dsc
autopkgtest [18:52:38]: testing package thunderbird version 1:68.8.0-1
autopkgtest [18:52:38]: build not needed
autopkgtest [18:53:28]: test help.sh: preparing testbed
Reading package lists...
Building dependency tree...
Reading state information...
Correcting dependencies...Starting pkgProblemResolver with broken count: 0
Starting 2 pkgProblemResolver with broken count: 0
Done
 Done
Starting pkgProblemResolver with broken count: 0
Starting 2 pkgProblemResolver with broken count: 0
Done

(output continues...)
autopkgtest [18:54:49]: test help.sh: [-----------------------
Test1: checking help output...done.
Test2: checking version output...done.
autopkgtest [18:54:50]: test help.sh: -----------------------]
autopkgtest [18:54:51]: test help.sh:  - - - - - - - - - - results - - - - - - - - - -
help.sh              PASS
autopkgtest [18:54:51]: @@@@@@@@@@@@@@@@@@@@ summary
help.sh              PASS
qemu-system-x86_64: terminating on signal 15 from pid 35333 (/usr/bin/python3)

From: Mark Hindley <mark@???>
Subject: Re: bug#461: autopkgtest-virt-qemu always fails with <VirtSubproc>: failure: timed out on client shared directory setup
Date: Sat, 16 May 2020 10:39:42 +0100

> Control: tags -1 debian
>
> Ryutaroh,
>
> Thanks for this.
>
> On Sat, May 16, 2020 at 05:07:43PM +0900, Ryutaroh Matsumoto wrote:
>> Package: autopkgtest
>> Version: 5.13.1
>> Severity: grave
>> Tags: beowulf ceres
>> Justification: renders package unusable
>> Control: found -1 5.10
>>
>> Dear Maintainer,
>>
>> After building a testbed by
>> autopkgtest-build-qemu ceres /var/tmp/ceres-amd64.img http://deb.devuan.org/merged
>> and adjust /etc/inittab in the testbed so that it accepts login
>> from /dev/ttyS[01],
>>
>> autopkgtest -U -B thunderbird -o /var/tmp/autopkgtest-thunderbird1 -- qemu --ram-size=2048 /var/tmp/ceres-amd64.img
>> autopkgtest [15:57:43]: starting date: 2020-05-16
>> autopkgtest [15:57:43]: version 5.13.1
>> autopkgtest [15:57:43]: host devuan; command line: /usr/bin/autopkgtest -U -B thunderbird -o /var/tmp/autopkgtest-thunderbird1 -- qemu --ram-size=2048 /var/tmp/ceres-amd64.img
>> qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5]
>> qemu-system-x86_64: terminating on signal 15 from pid 12727 (/usr/bin/python3)
>> <VirtSubproc>: failure: timed out on client shared directory setup
>> autopkgtest [15:58:20]: ERROR: testbed failure: cannot send to testbed: [Errno 32] Broken pipe
>
> These are all unforked packages that Devuan uses directly from
> Debian.
>
> Please could you report this to Debian BTS?
>
> Thanks
>
> Mark