UnicodeDecodeError with xenial on custom package-installs

[Philip Choi]

Was using disk-image-create command to build a Ubuntu 16.04 (Xenial) image with custom elements containing "chrony" package. It failed with below exception. Ubuntu 16.04 is installed with python3 as default so I guess somewhere within package-installs-v2 is not handling the UTF8<>ascii conversion very well. But to be honest I am not a developer so any pointer or suggestions to address or get around this would be greatly appreciated. Thanks!

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> Setting up chrony (2.1.1-1) ...
Traceback (most recent call last):
  File "/usr/local/bin/package-installs-v2", line 137, in <module>
    main()
  File "/usr/local/bin/package-installs-v2", line 130, in main
    process_output(install_args, follow=True)
  File "/usr/local/bin/package-installs-v2", line 38, in process_output
    for line in iter(proc.stdout.readline, ''):
  File "/usr/lib/python3.5/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 59: ordinal not in range(128)
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[Mathieu Gagné (mgagne)]

I don't have a proper fix to suggest. I however managed to workaround the issue by exporting the following environment variables in a custom DIB element:

# foobar/environment.d/00-locale
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8