[Bug 1639826] [NEW] Installer crashed after attempting to install GRUB

[Nino]

Public bug reported:

ubuntu at ubuntu:~$ lsb_release -rd
Description:	Ubuntu 16.04.1 LTS
Release:	16.04

ubuntu at ubuntu:~$ apt-cache policy grub
grub:
  Installed: (none)
  Candidate: 0.97-29ubuntu68
  Version table:
     0.97-29ubuntu68 500
        500 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages


During what ought to be a straight-forward installation the installer choked on installing GRUB, throwing an error and directing me to file this bug report. The system I'm installing on already has partitions set up: an EXT4 partition (where I'm installing to), a SWAP partition, and a NTFS partition with Windows 10.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.2 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
Date: Mon Nov  7 15:51:58 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug ubiquity-2.21.63.2 ubuntu xenial

** Attachment added: "Screenshot of gParted showing the partitions"
   https://bugs.launchpad.net/bugs/1639826/+attachment/4774055/+files/screenshot.jpg

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https://bugs.launchpad.net/bugs/1639826

Title:
  Installer crashed after attempting to install GRUB

Status in grub-installer package in Ubuntu:
  New

Bug description:
  ubuntu at ubuntu:~$ lsb_release -rd
  Description:	Ubuntu 16.04.1 LTS
  Release:	16.04

  ubuntu at ubuntu:~$ apt-cache policy grub
  grub:
    Installed: (none)
    Candidate: 0.97-29ubuntu68
    Version table:
       0.97-29ubuntu68 500
          500 cdrom://Ubuntu 16.04.1 LTS _Xenial Xerus_ - Release amd64 (20160719) xenial/main amd64 Packages
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  
  During what ought to be a straight-forward installation the installer choked on installing GRUB, throwing an error and directing me to file this bug report. The system I'm installing on already has partitions set up: an EXT4 partition (where I'm installing to), a SWAP partition, and a NTFS partition with Windows 10.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.2 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
  Uname: Linux 4.4.0-31-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CasperVersion: 1.376
  Date: Mon Nov  7 15:51:58 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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