Trying to post a review using post-review fails if the diff contains some non-ascii characters. For a more elaborate description, see the bug report. This fix was proposed by truan and it works for me. Thanks for considering it.

Here is an example diff which makes post-review fail prior this fix and succeed after:

diff --git a/config/locales/fr.yml b/config/locales/fr.yml
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -15,7 +15,7 @@ fr:
     log_in:             "Se connecter"
     logging_in:         "Connexion"
     login:              "Identifiant"
-    login_failed:       "L'établissement de la connexion a échoué."
+#    login_failed:       "L'établissement de la connexion a échoué."
     password_not_blank: "Veuillez entrer votre mot de passe."
     username_not_blank: "Veuillez entrer votre nom d'utilisateur."
     username_and_password_not_blank: "Veuillez entrer vos nom d'utilisateur et mot de passe."

Feel free to cherry-pick this commit: https://github.com/jerboaa/rbtools/commit/dc48e01e116731594448a776483ee3729eb4255d

Tested with above diff. Fails prior, succeeds after. I don't think this extra str() call is very problematic. Am I wrong?