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Detect UnicodeDecodeErrors when parsing config file
Please describe how you installed Flake8
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Please provide the exact, unmodified output of flake8 --bug-report
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Please describe the problem or feature
See also https://stackoverflow.com/questions/45401877/fix-error-unicodedecodeerror-with-flake8
If a config file has characters that we cannot handle, we should catch the UnicodeDecodeError and raise a new error to help the user understand what went wrong.
If this is a bug report, please explain with examples (and example code) what you expected to happen and what actually happened.