[Bug 1861537] [NEW] installer crashes when it is "creating partitions" or "calculating files to skip copying"

[Chris]

Public bug reported:

I believe that the installer crashes at the points listed in the title,
but I cannot be for sure. But those are the things that it is saying at
the time it crashes.

If it is not listed, I am trying to install to a single NVMe drive, and
it is the only one. I am able to install Ubuntu (vanilla), but Xubuntu
and Kubuntu and KDE Neon do this same exact thing, with the same exact
error.

Xubuntu 19.10

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: ubiquity 19.10.21
ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
Uname: Linux 5.3.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
CasperVersion: 1.427
Date: Fri Jan 31 19:09:49 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed quiet splash ---
LiveMediaBuild: Xubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug eoan third-party-packages ubiquity-19.10.21 xubuntu

** Attachment added: "syslog"
   https://bugs.launchpad.net/bugs/1861537/+attachment/5324519/+files/syslog

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https://bugs.launchpad.net/bugs/1861537

Title:
  installer crashes when it is "creating partitions" or "calculating
  files to skip copying"

Status in ubiquity package in Ubuntu:
  New

Bug description:
  I believe that the installer crashes at the points listed in the
  title, but I cannot be for sure. But those are the things that it is
  saying at the time it crashes.

  If it is not listed, I am trying to install to a single NVMe drive,
  and it is the only one. I am able to install Ubuntu (vanilla), but
  Xubuntu and Kubuntu and KDE Neon do this same exact thing, with the
  same exact error.

  Xubuntu 19.10

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: ubiquity 19.10.21
  ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
  Uname: Linux 5.3.0-18-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu8
  Architecture: amd64
  CasperVersion: 1.427
  Date: Fri Jan 31 19:09:49 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed quiet splash ---
  LiveMediaBuild: Xubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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