UnicodeEncodeError: 'ascii' codec can't encode character

File "/usr/lib/python3.6/site-packages/gitlabemu/helpers.py", line 160, in writeout
    self.stdout.write(decoded)
UnicodeEncodeError: 'ascii' codec can't encode character '\u2018' in position 48: ordinal not in range(128)

Seems to occur when the locale of the controlling terminal isn't compatible with the locale inside the build, or if the build process dumps raw binary.

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