Analysis fail on unicode characters on pyproject.toml ON WINDOWS only

[staticdev]

Describe the bug
If you add coverage with toml extra and have unicode characters on your pyproject.toml you get enconding error on coverage analysis on Windows only.

To Reproduce
How can we reproduce the problem?

1. What version of Python are you using? 3.8.2
2. What version of coverage.py are you using?

# coverage debug sys
-- sys -------------------------------------------------------
                        version: 5.1
                       coverage: /home/static/.cache/pypoetry/virtualenvs/toml-validator-zr_HNKMd-py3.8/lib/python3.8/site-packages/coverage/__init__.py
                         tracer: -none-
                        CTracer: available
           plugins.file_tracers: -none-
            plugins.configurers: -none-
      plugins.context_switchers: -none-
              configs_attempted: .coveragerc
                                 setup.cfg
                                 tox.ini
                                 pyproject.toml
                   configs_read: /home/static/workspace/toml-validator/pyproject.toml
                    config_file: /home/static/workspace/toml-validator/pyproject.toml
                config_contents: '[tool.poetry]\nname = "toml-validator"\nversion = "1.3.1"\ndescription = "Simple TOML file validator using Python."\nauthors = ["Thiago Carvalho D\'Ávila <[email protected]>"]\nlicense = "MIT"\nreadme = "README.md"\nrepository = "https://github.com/staticdev/toml-validator"\nhomepage = "https://github.com/staticdev/toml-validator"\n\n[tool.poetry.dependencies]\npython = "^3.7"\ntomlkit = ">=0.5.9,<0.7.0"\nclick = "^7.0"\nimportlib_metadata = {version = "^1.6.0", python = "<3.8"}\n\n[tool.poetry.dev-dependencies]\npytest = "^5.4.2"\ncoverage = {extras = ["toml"], version = "^5.0.3"}\nblack = "^19.10b0"\nflake8 = "^3.8.1"\nflake8-bandit = "^2.1.2"\nflake8-black = "^0.2.0"\nflake8-bugbear = "^20.1.4"\nsafety = "^1.8.5"\nmypy = "^0.770"\ncodecov = "^2.1.1"\npytest-mock = "^3.0.0"\ntypeguard = "^2.7.1"\npre-commit = "^2.4.0"\n\n[tool.poetry.scripts]\ntoml-validator = "toml_validator.__main__:main"\n\n[tool.coverage.paths]\nsource = ["src", "*/site-packages"] # configure source tree layout\n\n[tool.coverage.run]\nbranch = true # enable branch analysis\nsource = ["toml_validator"] # configure package name\n\n[tool.coverage.report]\nshow_missing = true\nfail_under = 100\n\n[build-system]\nrequires = ["poetry>=0.12"]\nbuild-backend = "poetry.masonry.api"\n'
                      data_file: -none-
                         python: 3.8.2 (default, Apr  5 2020, 18:58:01) [GCC 9.2.1 20191008]
                       platform: Linux-5.4.0-31-generic-x86_64-with-glibc2.29
                 implementation: CPython
                     executable: /home/static/.cache/pypoetry/virtualenvs/toml-validator-zr_HNKMd-py3.8/bin/python
                   def_encoding: utf-8
                    fs_encoding: utf-8
                            pid: 6371
                            cwd: /home/static/workspace/toml-validator
                           path: /home/static/.cache/pypoetry/virtualenvs/toml-validator-zr_HNKMd-py3.8/bin
                                 /home/static/.pyenv/versions/3.8.2/lib/python38.zip
                                 /home/static/.pyenv/versions/3.8.2/lib/python3.8
                                 /home/static/.pyenv/versions/3.8.2/lib/python3.8/lib-dynload
                                 /home/static/.cache/pypoetry/virtualenvs/toml-validator-zr_HNKMd-py3.8/lib/python3.8/site-packages
                                 /home/static/workspace/toml-validator/src
                    environment: PYENV_DIR = /home/static/.poetry/bin
                                 PYENV_HOOK_PATH = /home/static/.pyenv/pyenv.d:/usr/local/etc/pyenv.d:/etc/pyenv.d:/usr/lib/pyenv/hooks:/home/static/.pyenv/plugins/pyenv-virtualenv/etc/pyenv.d:/home/static/.pyenv/plugins/pyenv-which-ext/etc/pyenv.d
                                 PYENV_ROOT = /home/static/.pyenv
                                 PYENV_SHELL = bash
                                 PYENV_VERSION = 3.8.2:3.7.6
                                 PYENV_VIRTUALENV_INIT = 1
                   command_line: /home/static/.cache/pypoetry/virtualenvs/toml-validator-zr_HNKMd-py3.8/bin/coverage debug sys
                sqlite3_version: 2.6.0
         sqlite3_sqlite_version: 3.31.1
             sqlite3_temp_store: 0
        sqlite3_compile_options: COMPILER=gcc-9.3.0
                                 ENABLE_COLUMN_METADATA
                                 ENABLE_DBSTAT_VTAB
                                 ENABLE_FTS3
                                 ENABLE_FTS3_PARENTHESIS
                                 ENABLE_FTS3_TOKENIZER
                                 ENABLE_FTS4
                                 ENABLE_FTS5
                                 ENABLE_JSON1
                                 ENABLE_LOAD_EXTENSION
                                 ENABLE_PREUPDATE_HOOK
                                 ENABLE_RTREE
                                 ENABLE_SESSION
                                 ENABLE_STMTVTAB
                                 ENABLE_UNLOCK_NOTIFY
                                 ENABLE_UPDATE_DELETE_LIMIT
                                 HAVE_ISNAN
                                 LIKE_DOESNT_MATCH_BLOBS
                                 MAX_SCHEMA_RETRY=25
                                 MAX_VARIABLE_NUMBER=250000
                                 OMIT_LOOKASIDE
                                 SECURE_DELETE
                                 SOUNDEX
                                 TEMP_STORE=1
                                 THREADSAFE=1
                                 USE_URI

1. What versions of what packages do you have installed?

# pip freeze
appdirs==1.4.4
attrs==19.3.0
bandit==1.6.2
black==19.10b0
certifi==2020.4.5.1
cfgv==3.1.0
chardet==3.0.4
click==7.1.2
codecov==2.1.1
coverage==5.1
distlib==0.3.0
dparse==0.5.1
entrypoints==0.3
filelock==3.0.12
flake8==3.8.1
flake8-bandit==2.1.2
flake8-black==0.2.0
flake8-bugbear==20.1.4
flake8-polyfill==1.0.2
gitdb==4.0.5
GitPython==3.1.2
identify==1.4.15
idna==2.9
mccabe==0.6.1
more-itertools==8.3.0
mypy==0.770
mypy-extensions==0.4.3
nodeenv==1.3.5
packaging==20.4
pathspec==0.8.0
pbr==5.4.5
pipenv==2018.11.26
pluggy==0.13.1
pre-commit==2.4.0
py==1.8.1
pycodestyle==2.6.0
pyflakes==2.2.0
pyparsing==2.4.7
pytest==5.4.2
pytest-mock==3.1.0
PyYAML==5.3.1
regex==2020.5.14
requests==2.23.0
safety==1.9.0
six==1.14.0
smmap==3.0.4
stevedore==1.32.0
toml==0.10.1
-e git+https://github.com/staticdev/toml-validator.git@85ed311bc393956045316d7857470956d3e338ed#egg=toml_validator
tomlkit==0.6.0
typed-ast==1.4.1
typeguard==2.7.1
typing-extensions==3.7.4.2
urllib3==1.25.9
virtualenv==20.0.21
virtualenv-clone==0.5.4
wcwidth==0.1.9

1. What code are you running?
   See Github actions output from this pull request: Windows staticdev/toml-validator#51

2. What commands did you run?
   coverage run --parallel -m pytest

Please note that if you change the author name that has the character Á in Ávila from pyproject.toml, the error goes away!

Expected behavior
No error at all.

Additional context
Another package that had exactly the same issue has the following fix: https://github.com/pre-commit/pre-commit-hooks/pull/479/files

[nedbat]

Thanks, this is fixed in 2cee76e.

[staticdev]

Very nice @nedbat, I will try as soon as there is a new release ^_^x thank a lot for being so effective!

[staticdev]

@nedbat is there any expected release for coveragepy for me to test this?

[nedbat]

This is now released as part of coverage 5.2.

[staticdev]

Thanks! Testing it today =)

[staticdev]

It works! Thanks a lot @nedbat.