[Bug 1832332] [NEW] Subiquity crashes when 'Search domain' is set in network config

[morph]

Public bug reported:

I'm trying to install Ubuntu Server 18.04.02 on a production Qemu/KVM
host. When I enter my data (static IP) in the network configuration
dialog _including_ 'Search domains:' and hit 'Done', subiquity crashes
and I'm thrown back to the language selection screen. For a split second
I can see Python error messages, but they don't seem to be saved
anywhere. If I leave 'Search domains' empty, the installation proceeds
as expected.

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


** Tags: installer subiquiti

** Description changed:

  I'm trying to install Ubuntu Server 18.04.02 on a production Qemu/KVM
  host. When I enter my data (static IP) in the network configuration
- dialog _including_ 'Search domains:', subiquity crashes and I'm thrown
- back to the language selection window. For a split second I can see
- Python error messages, but they don't seem to be saved anywhere. If I
- leave 'Search domains' empty, the installation proceeds as expected.
+ dialog _including_ 'Search domains:' and hit 'Done', subiquity crashes
+ and I'm thrown back to the language selection screen. For a split second
+ I can see Python error messages, but they don't seem to be saved
+ anywhere. If I leave 'Search domains' empty, the installation proceeds
+ as expected.

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https://bugs.launchpad.net/bugs/1832332

Title:
  Subiquity crashes when 'Search domain' is set in network config

Status in subiquity package in Ubuntu:
  New

Bug description:
  I'm trying to install Ubuntu Server 18.04.02 on a production Qemu/KVM
  host. When I enter my data (static IP) in the network configuration
  dialog _including_ 'Search domains:' and hit 'Done', subiquity crashes
  and I'm thrown back to the language selection screen. For a split
  second I can see Python error messages, but they don't seem to be
  saved anywhere. If I leave 'Search domains' empty, the installation
  proceeds as expected.

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