[Bug 1462651] [NEW] Installer fails to report encrypted partition, acts surprised when attempting to mount unformatted junk data as ext4

[Jonas Thiem]

Public bug reported:

The graphical installer fails to format encrypted partition if you try
to set up more than one and explicitly mark it all for formatting, and
then it acts surprised when attempting to mount unformatted junk data as
ext4 and aborts.

You can see the setup of the disk in the attached screenshot, with both sda5_crypt and sda6_crypt clearly set to be formatted.
You can also see the popup fails to recognize the formatting of sda5_crypt.

Unsurprisingly, if I click "Continue", I get a pretty much instant mount
failure of sda5_crypt and it aborts.

I tried rebooting, deleting the whole encrypted partitions and setting
it up again the same way, same result.

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

** Attachment added: "setup2.png"
   https://bugs.launchpad.net/bugs/1462651/+attachment/4410842/+files/setup2.png

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https://bugs.launchpad.net/bugs/1462651

Title:
  Installer fails to report encrypted partition, acts surprised when
  attempting to mount unformatted junk data as ext4

Status in base-installer package in Ubuntu:
  New

Bug description:
  The graphical installer fails to format encrypted partition if you try
  to set up more than one and explicitly mark it all for formatting, and
  then it acts surprised when attempting to mount unformatted junk data
  as ext4 and aborts.

  You can see the setup of the disk in the attached screenshot, with both sda5_crypt and sda6_crypt clearly set to be formatted.
  You can also see the popup fails to recognize the formatting of sda5_crypt.

  Unsurprisingly, if I click "Continue", I get a pretty much instant
  mount failure of sda5_crypt and it aborts.

  I tried rebooting, deleting the whole encrypted partitions and setting
  it up again the same way, same result.

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