It indeed installed successfully, QEMU 7.2.19

It's been over a year since i don't have access to SPARC machines, none of them, so cannot verify, unfortunately

Good to hear it got reproduced! As for the 12045, it's the win build provided by Stefan Weil,

Host environment

• Operating system: Windows 8.1, also Ubuntu 22.04.3 LTS

• OS/kernel version: 5.15.0-88-generic #98-Ubuntu SMP Mon Oct 2 15:18:56 UTC 2023

• Architecture:

• QEMU flavor: qemu-system-sparc64

• QEMU version: QEMU emulator version 8.2.0 (v8.2.0-12045-g3d58f9b5c5), also 1:6.2+dfsg-2ubuntu6.16

• QEMU command line:

  ./qemu-system-sparc64 -M sun4u -L C:\qrl\sparc  -nographic -m 2048    -hda C:\qrl\sparc\disk1 -cdrom C:\qrl\sparc\debian-12.0.0-sparc64-NETINST-1.iso

Emulated/Virtualized environment

• Operating system:
  https://cdimage.debian.org/cdimage/ports/12.0/sparc64/debian-12.0.0-sparc64-NETINST-1.iso\ sha256: 89147b9fe060e6f94fc90c788b07f57e988b4c68d7a7b8ef9dd24358364e9593

Description of problem

Steps to reproduce

1. Start the installer normally (boot cdrom), use guided all disk partition, change ext4 to btrfs for /
2. Installer always segfaults at the same place while installing base system step:

Jan 28 09:17:48 debootstrap: Setting up mawk (1.3.4.20200120-3.1) ...
Jan 28 09:17:49 debootstrap: update-alternatives:
Jan 28 09:17:49 debootstrap: using /usr/bin/mawk to provide /usr/bin/awk (awk) i
n auto mode
Jan 28 09:17:49 debootstrap:
Jan 28 09:17:54 debootstrap: Selecting previously unselected package debconf.
Jan 28 09:17:54 debootstrap: (Reading database ... 1459 files and directories cu
rrently installed.)
Jan 28 09:17:54 debootstrap: Preparing to unpack .../debconf_1.5.82_all.deb ...
Jan 28 09:17:54 debootstrap: Unpacking debconf (1.5.82) ...
Jan 28 09:17:55 kernel: [ 2994.426867] dpkg-deb[12709]: segfault at ffffffffffff
ffff ip fffff80100a1c3ec (rpc 0000000000000030) sp fffff80102402041 error 1 in l
iblzma.so.5.4.1[fffff80100a00000+2a000]
Jan 28 09:17:55 debootstrap: dpkg-deb: error: <decompress> subprocess was killed
 by signal (Segmentation fault)
Jan 28 09:17:56 debootstrap: dpkg: error processing archive /var/cache/apt/archi
ves/debconf_1.5.82_all.deb (--install):
Jan 28 09:17:56 debootstrap:  dpkg-deb --fsys-tarfile subprocess returned error
exit status 2
Jan 28 09:17:57 debootstrap: Errors were encountered while processing:
Jan 28 09:17:57 debootstrap:  /var/cache/apt/archives/debconf_1.5.82_all.deb
Jan 28 09:18:10 base-installer: error: exiting on error base-installer/debootstr


cd /target/var/cache/apt/archives
# ar x debconf_1.5.82_all.deb
/target/var/cache/apt/archives # unxz data.tar.xz
/target/var/cache/apt/archives # unxz control.tar.xz

another try, to ext2 fs:

Jan 28 10:31:16 debootstrap: Preparing to unpack .../dpkg_1.21.21_sparc64.deb ..
.
Jan 28 10:31:16 debootstrap: Unpacking dpkg (1.21.21) over (1.21.21) ...
Jan 28 10:31:23 kernel: [ 7402.528016] dpkg-deb[20720]: segfault at 7240015 ip f
ffff8010091def4 (rpc 000000006e17c498) sp fffff80103124041 error 1 in liblzma.so
.5.4.1[fffff80100900000+2a000]
Jan 28 10:31:23 debootstrap: dpkg-deb: error: <decompress> subprocess was killed
 by signal (Segmentation fault)
Jan 28 10:31:24 debootstrap: dpkg: error processing archive /var/cache/apt/archi
ves/dpkg_1.21.21_sparc64.deb (--install):
Jan 28 10:31:24 debootstrap:  cannot copy extracted data for './usr/share/doc/dp
kg/changelog.gz' to '/usr/share/doc/dpkg/changelog.gz.dpkg-new': unexpected end
of file or stream

Additional information

All times i've tried under Ubuntu qemu or latest build for Windows it segfaults unpacking package, and i believe it's a misleading error message, since very same ISO installs normally on Sun Fire T1000 machine (sun4v). I've tried also booting FreeBSD-12.4-RELEASE-sparc64-disc1.iso which dies shortly after booting the kernel, but i am more interested in Debian, since it was verified to work on a real hardware. BTW i was able to unpack specified file with "ar x" within installer.

7 days site was FUBAR

@CommonsHost don't you have service monitoring ;) ? pic.twitter.com/sap2r2uG4O

— John117 (@ibsuser) September 16, 2020

• Connected to commons.host (139.162.131.245) port 443 (#0)
• ALPN, offering h2
• ALPN, offering http/1.1
• successfully set certificate verify locations:
• CAfile: none CApath: /etc/ssl/certs
• TLSv1.3 (OUT), TLS handshake, Client hello (1):
• TLSv1.3 (IN), TLS handshake, Server hello (2):
• TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
• TLSv1.3 (IN), TLS handshake, Certificate (11):
• TLSv1.3 (IN), TLS handshake, CERT verify (15):
• TLSv1.3 (IN), TLS handshake, Finished (20):
• TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
• TLSv1.3 (OUT), TLS handshake, Finished (20):
• SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
• ALPN, server accepted to use h2
• Server certificate:
• subject: CN=commons.host
• start date: Jun 15 21:35:32 2020 GMT
• expire date: Sep 13 21:35:32 2020 GMT
• issuer: C=US; O=Let's Encrypt; CN=Let's Encrypt Authority X3
• SSL certificate verify result: certificate has expired (10), continuing anyway.

@CommonsHost don't you have service monitoring ;) ? pic.twitter.com/sap2r2uG4O

— John117 (@ibsuser) September 16, 2020