Comment 11 for bug 1604160

After reading carefully, I was able to recreate this by installing shim-signed.

etting up shim-signed (1.18~16.04.1+0.8-0ubuntu2) ...
find: Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python3/dist-packages/apport/report.py", line 15, in <module>
    import xml.dom, xml.dom.minidom
ImportError: No module named 'xml.dom'

Original exception was:
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-op_78f0n/xenial", line 8, in <module>
    sys.exit(main())
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeMain.py", line 242, in main
    if app.run():
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeController.py", line 1876, in run
    return self.fullUpgrade()
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeController.py", line 1841, in fullUpgrade
    if not self.doDistUpgrade():
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeController.py", line 1182, in doDistUpgrade
    res = self.cache.commit(fprogress,iprogress)
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeCache.py", line 267, in commit
    apt.Cache.commit(self, fprogress, iprogress)
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 501, in commit
    # which is less than optimal!
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 465, in install_archives

  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeView.py", line 234, in run
    res = os.WEXITSTATUS(self.wait_child())
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeView.py", line 200, in wait_child
    self.update_interface()
  File "/tmp/ubuntu-release-upgrader-op_78f0n/DistUpgrade/DistUpgradeViewNonInteractive.py", line 229, in update_interface
    sys.stdout.write("%s" % s.decode(locale.getpreferredencoding()))
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe2 in position 0: unexpected end of data