[Bug 1586844] [NEW] ubiquity crashed during install on md raid1

[John Center]

Public bug reported:

My system is UEFI.  I am installing Ubuntu 16.04 desktop on btrfs on top
of mdadm raid1.  Installer failed when trying to install grub-efi-
amd64-bin.

root at ubuntu:/opt/build/btrfs-progs# lsb_release -rd
Description:	Ubuntu 16.04 LTS
Release:	16.04

root at ubuntu:/opt/build/btrfs-progs# apt-cache policy grub-efi-amd64-bin
grub-efi-amd64-bin:
  Installed: 2.02~beta2-36ubuntu3
  Candidate: 2.02~beta2-36ubuntu3
  Version table:
 *** 2.02~beta2-36ubuntu3 500
        500 cdrom://Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1) xenial/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

I expected the installer to complete or fail to install grub2.  I didn't
expect it to crash.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.1 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
Date: Sun May 29 17:35:25 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
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-2.21.63.1 ubuntu xenial

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https://bugs.launchpad.net/bugs/1586844

Title:
  ubiquity crashed during install on md raid1

Status in grub-installer package in Ubuntu:
  New

Bug description:
  My system is UEFI.  I am installing Ubuntu 16.04 desktop on btrfs on
  top of mdadm raid1.  Installer failed when trying to install grub-efi-
  amd64-bin.

  root at ubuntu:/opt/build/btrfs-progs# lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  root at ubuntu:/opt/build/btrfs-progs# apt-cache policy grub-efi-amd64-bin
  grub-efi-amd64-bin:
    Installed: 2.02~beta2-36ubuntu3
    Candidate: 2.02~beta2-36ubuntu3
    Version table:
   *** 2.02~beta2-36ubuntu3 500
          500 cdrom://Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1) xenial/main amd64 Packages
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  I expected the installer to complete or fail to install grub2.  I
  didn't expect it to crash.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.1 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CasperVersion: 1.376
  Date: Sun May 29 17:35:25 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  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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