[Bug 1810089] [NEW] The installation program crashes /grub2 not installed

[RANDRIAMBOLOLONIRINA Lakamanana Trimofoloalina]

Public bug reported:

It's displayed that "grub(something) can't be installed, so the
installed system won't be able to launch". Then I clicked to validate,
then a message says "installation wizard has crashed.... blablabla a
report" :)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.6 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CasperVersion: 1.394
Date: Sun Dec 30 20:27:27 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ubiquity-18.04.14.6 ubuntu

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https://bugs.launchpad.net/bugs/1810089

Title:
  The installation program crashes /grub2 not installed

Status in grub-installer package in Ubuntu:
  New

Bug description:
  It's displayed that "grub(something) can't be installed, so the
  installed system won't be able to launch". Then I clicked to validate,
  then a message says "installation wizard has crashed.... blablabla a
  report" :)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14.6 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
  Uname: Linux 4.15.0-29-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CasperVersion: 1.394
  Date: Sun Dec 30 20:27:27 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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