TypeError: "not all arguments converted during string formatting" in on_export_download_dialog_done

[kozlovsky]

Here:

    def on_export_download_request_done(self, filename, data):
        ...
        try:
            ...
        except OSError as exc:
            ...
            tr("An error occurred when exporting the torrent file: %s") % str(exc),
            ...

The reason for the error is an incorrect translation in ru_RU.ts:

    <message>
        <location filename="../widgets/downloadspage.py" line="463"/>
        <source>An error occurred when exporting the torrent file: %s</source>
        <translation>Ошибка при экспорте торрент-файла:</translation>
    </message>

We already have a TranslatedString class that catches KeyError exception, it should catch TypeError exceptions as well to prevent the application crash in case of such an error.

Also, it may be a good idea to add a tool that analyzes translation files and checks that the number of %s placeholders in each translated string is the same as in the corresponding original string.

[sentry-for-tribler]

Sentry issue: TRIBLER-1C0

[kozlovsky]

Fixed in #7615