# Buggy code
def from_file(self, filename, our_file):
    """Read configuration from a .rc file.

    `filename` is a file name to read.

    `our_file` is True if this config file is specifically for coverage,
    False if we are examining another config file (tox.ini, setup.cfg)
    for possible settings.

    Returns True or False, whether the file could be read, and it had some
    coverage.py settings in it.

    """
    _, ext = os.path.splitext(filename)
    if ext == ".toml":
        cp = TomlConfigParser(our_file)
    else:
        cp = HandyConfigParser(our_file)

    self.attempted_config_files.append(filename)

    try:
        files_read = cp.read(filename)
    except (configparser.Error, TomlDecodeError) as err:
        raise CoverageException("Couldn't read config file %s: %s" % (filename, err))
    if not files_read:
        return False

    self.config_files_read.extend(files_read)

    any_set = False
    try:
        for option_spec in self.CONFIG_FILE_OPTIONS:
            was_set = self._set_attr_from_config_option(cp, *option_spec)
            if was_set:
                any_set = True
    except ValueError as err:
        raise CoverageException("Couldn't read config file %s: %s" % (filename, err))

    # Check that there are no unrecognized options.
    all_options = collections.defaultdict(set)
    for option_spec in self.CONFIG_FILE_OPTIONS:
        section, option = option_spec[1].split(":")
        all_options[section].add(option)

    for section, options in iitems(all_options):
        real_section = cp.has_section(section)
        if real_section:
            for unknown in set(cp.options(section)) - options:
                raise CoverageException(
                    "Unrecognized option '[%s] %s=' in config file %s"
                    % (real_section, unknown, filename)
                )

    # [paths] is special
    if cp.has_section("paths"):
        for option in cp.options("paths"):
            self.paths[option] = cp.getlist("paths", option)
            any_set = True

    # plugins can have options
    for plugin in self.plugins:
        if cp.has_section(plugin):
            self.plugin_options[plugin] = cp.get_section(plugin)
            any_set = True

    # Was this file used as a config file? If it's specifically our file,
    # then it was used.  If we're piggybacking on someone else's file,
    # then it was only used if we found some settings in it.
    if our_file:
        used = True
    else:
        used = any_set

    if used:
        self.config_file = filename
        with open(filename) as f:
            self._config_contents = f.read()

    return used


# Traceback (EOFError)
Traceback (most recent call last):
File "repro.py", line 7, in <module>
with multiprocessing.Manager() as manager:
File "/usr/lib/python3.8/multiprocessing/context.py", line 57, in Manager
m.start()
File "/usr/lib/python3.8/multiprocessing/managers.py", line 583, in start
self._address = reader.recv()
File "/usr/lib/python3.8/multiprocessing/connection.py", line 250, in recv
buf = self._recv_bytes()
File "/usr/lib/python3.8/multiprocessing/connection.py", line 414, in _recv_bytes
buf = self._recv(4)
File "/usr/lib/python3.8/multiprocessing/connection.py", line 383, in _recv
raise EOFError
EOFError

# Fixed code
def from_file(self, filename, our_file):
    """Read configuration from a .rc file.

    `filename` is a file name to read.

    `our_file` is True if this config file is specifically for coverage,
    False if we are examining another config file (tox.ini, setup.cfg)
    for possible settings.

    Returns True or False, whether the file could be read, and it had some
    coverage.py settings in it.

    """
    _, ext = os.path.splitext(filename)
    if ext == ".toml":
        cp = TomlConfigParser(our_file)
    else:
        cp = HandyConfigParser(our_file)

    self.attempted_config_files.append(filename)

    try:
        files_read = cp.read(filename)
    except (configparser.Error, TomlDecodeError) as err:
        raise CoverageException("Couldn't read config file %s: %s" % (filename, err))
    if not files_read:
        return False

    self.config_files_read.extend(map(os.path.abspath, files_read))

    any_set = False
    try:
        for option_spec in self.CONFIG_FILE_OPTIONS:
            was_set = self._set_attr_from_config_option(cp, *option_spec)
            if was_set:
                any_set = True
    except ValueError as err:
        raise CoverageException("Couldn't read config file %s: %s" % (filename, err))

    # Check that there are no unrecognized options.
    all_options = collections.defaultdict(set)
    for option_spec in self.CONFIG_FILE_OPTIONS:
        section, option = option_spec[1].split(":")
        all_options[section].add(option)

    for section, options in iitems(all_options):
        real_section = cp.has_section(section)
        if real_section:
            for unknown in set(cp.options(section)) - options:
                raise CoverageException(
                    "Unrecognized option '[%s] %s=' in config file %s"
                    % (real_section, unknown, filename)
                )

    # [paths] is special
    if cp.has_section("paths"):
        for option in cp.options("paths"):
            self.paths[option] = cp.getlist("paths", option)
            any_set = True

    # plugins can have options
    for plugin in self.plugins:
        if cp.has_section(plugin):
            self.plugin_options[plugin] = cp.get_section(plugin)
            any_set = True

    # Was this file used as a config file? If it's specifically our file,
    # then it was used.  If we're piggybacking on someone else's file,
    # then it was only used if we found some settings in it.
    if our_file:
        used = True
    else:
        used = any_set

    if used:
        self.config_file = os.path.abspath(filename)
        with open(filename) as f:
            self._config_contents = f.read()

    return used