[Bug 1902253] [NEW] crash after partitioning during installation

[sis]

Public bug reported:

crash after partitioning during installation:
installation next to a windows system
one primary /boot partition
one encrypted partition containing two logical partitions:
* /
* /home

version ubiquity 20.10.13

ubuntu at ubuntu:/$ lsb_release -rd
Description:	Ubuntu 20.10
Release:	20.10

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity 20.10.13
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.455
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 30 15:17:15 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz nomodeset file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
RebootRequiredPkgs:
 linux-image-5.8.0-26-generic
 linux-base
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug groovy ubiquity-20.10.13 ubuntu

** Attachment added: "partman logs"
   https://bugs.launchpad.net/bugs/1902253/+attachment/5429491/+files/partman

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https://bugs.launchpad.net/bugs/1902253

Title:
  crash after partitioning during installation

Status in ubiquity package in Ubuntu:
  New

Bug description:
  crash after partitioning during installation:
  installation next to a windows system
  one primary /boot partition
  one encrypted partition containing two logical partitions:
  * /
  * /home

  version ubiquity 20.10.13

  ubuntu at ubuntu:/$ lsb_release -rd
  Description:	Ubuntu 20.10
  Release:	20.10

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubiquity 20.10.13
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.455
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct 30 15:17:15 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz nomodeset file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  ProcEnviron:
   LANGUAGE=en_US.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   LC_NUMERIC=C.UTF-8
  RebootRequiredPkgs:
   linux-image-5.8.0-26-generic
   linux-base
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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