[Bug 1631098] Re: update_interface function of DistUpgradeViewNonInteractive should be rewritten

[Steve Langasek]

** Tags removed: rls-bb-incoming
** Tags added: rls-bb-notfixing

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https://bugs.launchpad.net/bugs/1631098

Title:
  update_interface function of DistUpgradeViewNonInteractive should be
  rewritten

Status in ubuntu-release-upgrader package in Ubuntu:
  Triaged

Bug description:
  As documented in bug 1614576 DistUpgradeViewNonInteractive was failing
  with a UnicodeDecodeError when writing text to the terminal.  While
  this been worked around by using "errors='ignore'" thereby skipping
  any failures to decode it would be better if the whole section was
  rewritten so the text is properly handled.

  Barry Warsaw suggested using asyncio.

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