Crash when clicking on "back" and "next" during install: request to /storage/v2/guided crashed with AttributeError

[Béné]

Today's noble daily, install in German, ZFS (no encryption), on physical hardware (MacbookPro mid2012).

When the partitioning overview came up just before kicking off the install, I clicked on "back" several times to check whether I had actually selected ZFS. I then clicked "next" again, got until the timezone selection screen and this error popped up. The installer is stuck - shows the turning orange circle on the next button, nothing further happens.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: subiquity (unknown)
ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4
Uname: Linux 6.8.0-11-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.494
CloudArchitecture: x86_64
CloudID: nocloud
CloudName: unknown
CloudPlatform: nocloud
CloudSubPlatform: seed-dir (/var/lib/cloud/seed/nocloud)
Date: Tue Mar 12 14:18:37 2024
ExecutablePath: /snap/ubuntu-desktop-bootstrap/29/bin/subiquity/subiquity/cmd/server.py
InterpreterPath: /snap/ubuntu-desktop-bootstrap/29/usr/bin/python3.10
LiveMediaBuild: Ubuntu 24.04 LTS "Noble Numbat" - Daily amd64 (20240311)
MachineType: Apple Inc. MacBookPro9,2
ProcAttrCurrent: snap.hostname-desktop-bootstrap.subiquity-server (complain)
ProcCmdline: /snap/hostname-desktop-bootstrap/29/usr/bin/python3.10 -m subiquity.cmd.server --use-os-prober --storage-version=2 --postinst-hooks-dir=/snap/hostname-desktop-bootstrap/29/etc/subiquity/postinst.d
ProcEnviron:
 LANG=C.UTF-8
 LD_LIBRARY_PATH=<set>
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz --- quiet splash
Python3Details: /usr/bin/python3.12, Python 3.12.2, python3-minimal, 3.12.1-0ubuntu2
PythonDetails: N/A
SnapChannel:

SnapRevision: 29
SnapUpdated: False
SnapVersion: 0+git.ea537ca1
SourcePackage: subiquity
Title: request to /storage/v2/guided crashed with AttributeError
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/18/2022
dmi.bios.release: 0.1
dmi.bios.vendor: Apple Inc.
dmi.bios.version: 429.0.0.0.0
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-6F01561E16C75D06
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro9,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-6F01561E16C75D06
dmi.modalias: dmi:bvnAppleInc.:bvr429.0.0.0.0:bd03/18/2022:br0.1:svnAppleInc.:pnMacBookPro9,2:pvr1.0:rvnAppleInc.:rnMac-6F01561E16C75D06:rvrMacBookPro9,2:cvnAppleInc.:ct10:cvrMac-6F01561E16C75D06:skuSystemSKU#:
dmi.product.family: MacBook Pro
dmi.product.name: MacBookPro9,2
dmi.product.sku: System SKU#
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Béné (bene-d)]

I can still reproduce this with today's daily (240313). When the partitioning overview shows up, I click "back" until I hit the screen where you select ZFS/etc, then I go forward again, clicking "next". The action stops on the timezone selection screen.

I DO NOT get the error anymore, but I'm still stuck on that screen with a little orange circle turning inside the "Next" button.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/2057673