Tor won't start on Windows when path contains non-ascii characters

When trying to start the TBB from the following path:

C:\Users\kuncaŭščyna\Downloads\Tor Browser\

got the following error:

Vidalia detected that the Tor software exited unexpectedly. Please check the message log for recent warning or error messages.

Here's the log:

Dez 16 18:27:21.431 [Hinweis] Tor v0.2.3.25 (git-17c24b3118224d65) running on Windows 7. Dez 16 18:27:21.431 [Hinweis] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Dez 16 18:27:21.431 [Warnung] Unable to open configuration file "C:\Users\kuncauscyna\Downloads\Tor Browser\Data\Tor\torrc". Dez 16 18:27:21.431 [Fehler] Reading config failed--see warnings above.

Diacritics were obviously "simplified" which created inexisting path.

I know Windows is not recommened for anonymity. But some people use TBB on Win only for censorship circumvention. The easiest solution is simply to add a message to log like:

Unable to open configuration file "C:\Users\kuncauscyna\Downloads\Tor Browser\Data\Tor\torrc". Please check that the path contains only ascii symbols.

But much better would be to fix it to process correctly path in unicode.

Trac:
Username: iktsuarpok