# Buggy code
def closeEvent(self, e):
    """Override closeEvent to display a confirmation if needed."""
    if crashsignal.is_crashing:
        e.accept()
        return
    tab_count = self.tabbed_browser.count()
    download_model = objreg.get("download-model", scope="window", window=self.win_id)
    download_count = download_model.running_downloads()
    quit_texts = []
    # Ask if multiple-tabs are open
    if "multiple-tabs" in config.val.confirm_quit and tab_count > 1:
        quit_texts.append(
            "{} {} open.".format(tab_count, "tab is" if tab_count == 1 else "tabs are")
        )
    # Ask if multiple downloads running
    if "downloads" in config.val.confirm_quit and download_count > 0:
        quit_texts.append(
            "{} {} running.".format(
                download_count,
                "download is" if download_count == 1 else "downloads are",
            )
        )
    # Process all quit messages that user must confirm
    if quit_texts or "always" in config.val.confirm_quit:
        msg = jinja.environment.from_string(
            """
                <ul>
                {% for text in quit_texts %}
                   <li>{{text}}</li>
                {% endfor %}
                </ul>
            """.strip()
        ).render(quit_texts=quit_texts)
        confirmed = message.ask(
            "Really quit?", msg, mode=usertypes.PromptMode.yesno, default=True
        )

        # Stop asking if the user cancels
        if not confirmed:
            log.destroy.debug("Cancelling closing of window {}".format(self.win_id))
            e.ignore()
            return
    e.accept()
    self._do_close()


# 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 closeEvent(self, e):
    """Override closeEvent to display a confirmation if needed."""
    if crashsignal.is_crashing:
        e.accept()
        return
    tab_count = self.tabbed_browser.widget.count()
    download_model = objreg.get("download-model", scope="window", window=self.win_id)
    download_count = download_model.running_downloads()
    quit_texts = []
    # Ask if multiple-tabs are open
    if "multiple-tabs" in config.val.confirm_quit and tab_count > 1:
        quit_texts.append(
            "{} {} open.".format(tab_count, "tab is" if tab_count == 1 else "tabs are")
        )
    # Ask if multiple downloads running
    if "downloads" in config.val.confirm_quit and download_count > 0:
        quit_texts.append(
            "{} {} running.".format(
                download_count,
                "download is" if download_count == 1 else "downloads are",
            )
        )
    # Process all quit messages that user must confirm
    if quit_texts or "always" in config.val.confirm_quit:
        msg = jinja.environment.from_string(
            """
                <ul>
                {% for text in quit_texts %}
                   <li>{{text}}</li>
                {% endfor %}
                </ul>
            """.strip()
        ).render(quit_texts=quit_texts)
        confirmed = message.ask(
            "Really quit?", msg, mode=usertypes.PromptMode.yesno, default=True
        )

        # Stop asking if the user cancels
        if not confirmed:
            log.destroy.debug("Cancelling closing of window {}".format(self.win_id))
            e.ignore()
            return
    e.accept()
    self._do_close()