Comment 11 for bug 1878890

From the crash:

Verifying /dev/sda2 exists
 Running command ['sfdisk', '--json', '/dev/sda'] with allowed return codes [0] (capture=True)
 Verifying /dev/sda2 size, expecting 86564143104 bytes, found 86564143104 bytes
 Device /dev/sda2 ptable entry: {
  "node": "/dev/sda2",
  "size": 169070592,
  "start": 61442048,
  "type": "83"
 }
 Verifying /dev/sda2 partition flag, expecting linux, found None
 An error occured handling 'partition-sda2': RuntimeError - Verifying /dev/sda2 partition flag, expecting linux, found None

Curtin has a logic bug here for msdos ptable and primary partitions; we should lookup the type found in ptable_uuid_to_flag_entry().