[Bug 1907967] [NEW] ubiquity crashes on grub-install

[Manos Sarris]

Public bug reported:

Ubuntu 20.10 installer (ubiquity) will crash on every attempt to install
on both my devices during grub-install.

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
CasperVersion: 1.455
Date: Sun Dec 13 16:15:27 2020
InstallCmdLine: fsck.mode=skip noprompt boot=casper floppy.allowed_drive_mask=0 ignore_uuid --
LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
RebootRequiredPkgs:
 linux-image-5.8.0-25-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

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https://bugs.launchpad.net/bugs/1907967

Title:
  ubiquity crashes on grub-install

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Ubuntu 20.10 installer (ubiquity) will crash on every attempt to
  install on both my devices during grub-install.

  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
  CasperVersion: 1.455
  Date: Sun Dec 13 16:15:27 2020
  InstallCmdLine: fsck.mode=skip noprompt boot=casper floppy.allowed_drive_mask=0 ignore_uuid --
  LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  RebootRequiredPkgs:
   linux-image-5.8.0-25-generic
   linux-base
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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