[Bug 1572754] Re: 16.04 installer failed during grub-install with error: attempt to install to encrypted disk without cryptodisk enabled. Set `GRUB_ENABLE_CRYPTODISK=1' in file `/etc/default/grub'

[TJ]

This isn't a duplicate of bug #1232237. In this case the config option
variable wasn't added to /etc/default/grub.

I've done so many permutations of these encrypted installations now I
cannot recall whether I did any manual partitioning in this particular
session. The partman log appears to suggest I didn't customise or do
manual partitioning but I'd have to look further into it.

** This bug is no longer a duplicate of bug 1232237
   GRUB_CRYPTODISK_ENABLE should be GRUB_ENABLE_CRYPTODISK

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https://bugs.launchpad.net/bugs/1572754

Title:
  16.04 installer failed during grub-install with error: attempt to
  install to encrypted disk without cryptodisk enabled. Set
  `GRUB_ENABLE_CRYPTODISK=1' in file `/etc/default/grub'

Status in grub-installer package in Ubuntu:
  Confirmed

Bug description:
  No idea why ubiquity crashed; maybe post mortem will reveal something.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.60 [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
  Architecture: amd64
  CasperVersion: 1.375
  Date: Wed Apr 20 22:49:10 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 (20160419)
  ProcEnviron:
   LANGUAGE=en_GB.UTF-8
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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