[Bug 1991413] [NEW] Autoinstall with storage-version 2 should guess unspecified offsets

[Olivier Gayot]

Public bug reported:

When storage-version is 2, the following autoinstall excerpt produces an
exception and the install fails.

```
        - type: disk
          ptable: gpt
          wipe: superblock-recursive
          path: /dev/sda
          grub_device: true
          id: disk-1

        - type: partition
          number: 1
          flag: boot
          device: disk-1
          size: 1G
          wipe: superblock
          id: partition-boot

        - type: partition
          number: 1
          flag: boot
          device: disk-1
          size: -1
          wipe: superblock
          id: partition-boot

```

TypeError: '<' not supported between instances of 'NoneType' and
'NoneType'

Full traceback: https://pastebin.canonical.com/p/Gf5D2wVWhN/

** Affects: subiquity (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  When storage-version is 2, the following autoinstall excerpt produces an
  exception:
  
  ```
-         - type: disk
-           ptable: gpt
-           wipe: superblock-recursive
-           path: /dev/sda
-           grub_device: true
-           id: disk-1
+         - type: disk
+           ptable: gpt
+           wipe: superblock-recursive
+           path: /dev/sda
+           grub_device: true
+           id: disk-1
  
-         - type: partition
-           number: 1
-           flag: boot
-           device: disk-1
-           size: 1G
-           wipe: superblock
-           id: partition-boot
+         - type: partition
+           number: 1
+           flag: boot
+           device: disk-1
+           size: 1G
+           wipe: superblock
+           id: partition-boot
  
-         - type: partition
-           number: 1
-           flag: boot
-           device: disk-1
-           size: 1G
-           wipe: superblock
-           id: partition-boot
+         - type: partition
+           number: 1
+           flag: boot
+           device: disk-1
+           size: -1
+           wipe: superblock
+           id: partition-boot
  
  ```
  
  TypeError: '<' not supported between instances of 'NoneType' and
  'NoneType'
  
- 
  Full traceback: https://pastebin.canonical.com/p/Gf5D2wVWhN/

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to subiquity in Ubuntu.
https://bugs.launchpad.net/bugs/1991413

Title:
  Autoinstall with storage-version 2 should guess unspecified offsets

Status in subiquity package in Ubuntu:
  New

Bug description:
  When storage-version is 2, the following autoinstall excerpt produces
  an exception and the install fails.

  ```
          - type: disk
            ptable: gpt
            wipe: superblock-recursive
            path: /dev/sda
            grub_device: true
            id: disk-1

          - type: partition
            number: 1
            flag: boot
            device: disk-1
            size: 1G
            wipe: superblock
            id: partition-boot

          - type: partition
            number: 1
            flag: boot
            device: disk-1
            size: -1
            wipe: superblock
            id: partition-boot

  ```

  TypeError: '<' not supported between instances of 'NoneType' and
  'NoneType'

  Full traceback: https://pastebin.canonical.com/p/Gf5D2wVWhN/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/1991413/+subscriptions