# Buggy code
def edit(self, text, caret_position=None):
    """Edit a given text.

    Args:
        text: The initial text to edit.
        caret_position: The position of the caret in the text.
    """
    if self._filename is not None:
        raise ValueError("Already editing a file!")
    try:
        # Close while the external process is running, as otherwise systems
        # with exclusive write access (e.g. Windows) may fail to update
        # the file from the external editor, see
        # https://github.com/qutebrowser/qutebrowser/issues/1767
        with tempfile.NamedTemporaryFile(
            # pylint: disable=bad-continuation
            mode="w",
            prefix="qutebrowser-editor-",
            encoding=config.val.editor.encoding,
            delete=False,
        ) as fobj:
            # pylint: enable=bad-continuation
            if text:
                fobj.write(text)
            self._filename = fobj.name
    except OSError as e:
        message.error("Failed to create initial file: {}".format(e))
        return

    self._remove_file = True

    line, column = self._calc_line_and_column(text, caret_position)
    self._start_editor(line=line, column=column)


# Traceback (ValueError)
16:39:44 DEBUG    init       app:_init_modules:468 Initializing websettings...
16:39:45 ERROR    misc       crashsignal:exception_hook:216 Uncaught exception
Traceback (most recent call last):
File "/bin/qutebrowser", line 11, in <module>
load_entry_point('qutebrowser==1.1.1', 'gui_scripts', 'qutebrowser')()
File "/usr/lib/python3.6/site-packages/qutebrowser/qutebrowser.py", line 188, in main
return app.run(args)
File "/usr/lib/python3.6/site-packages/qutebrowser/app.py", line 137, in run
init(args, crash_handler)
File "/usr/lib/python3.6/site-packages/qutebrowser/app.py", line 163, in init
_init_modules(args, crash_handler)
File "/usr/lib/python3.6/site-packages/qutebrowser/app.py", line 469, in _init_modules
websettings.init(args)
File "/usr/lib/python3.6/site-packages/qutebrowser/config/websettings.py", line 215, in init
webenginesettings.init(args)
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/webenginesettings.py", line 297, in init
websettings.init_mappings(MAPPINGS)
File "/usr/lib/python3.6/site-packages/qutebrowser/config/websettings.py", line 198, in init_mappings
mapping.set(value)
File "/usr/lib/python3.6/site-packages/qutebrowser/config/websettings.py", line 72, in set
self._set(value, settings=settings)
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/webenginesettings.py", line 154, in _set
filenames = [self._find_installed(code) for code in value]
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/webenginesettings.py", line 154, in <listcomp>
filenames = [self._find_installed(code) for code in value]
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/webenginesettings.py", line 143, in _find_installed
local_filename = spell.local_filename(code)
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/spell.py", line 64, in local_filename
all_installed = local_files(code)
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/spell.py", line 51, in local_files
for matching_dict in sorted(matching_dicts, key=version, reverse=True):
File "/usr/lib/python3.6/site-packages/qutebrowser/browser/webengine/spell.py", line 36, in version
.format(filename))
ValueError: the given dictionary file name is malformed: /usr/share/qt/qtwebengine_dictionaries/en-US.bdic

# Fixed code
def edit(self, text, caret_position=None):
    """Edit a given text.

    Args:
        text: The initial text to edit.
        caret_position: The position of the caret in the text.
    """
    if self._filename is not None:
        raise ValueError("Already editing a file!")
    try:
        self._filename = self._create_tempfile(text, "qutebrowser-editor-")
    except OSError as e:
        message.error("Failed to create initial file: {}".format(e))
        return

    self._remove_file = True

    line, column = self._calc_line_and_column(text, caret_position)
    self._start_editor(line=line, column=column)