Exposed filter selects first available option even if that option is not available, resulting in Illegal choice

To reproduce:

(1) new drupal
(2) new views, i18n from git
(3) enable views_ui, i18n_select, i18n_taxonomy
(4) makes sure there are two languages (e.g. english and french)
(5) admin/config/regional/language/configure: make sure URL detection is enabled.
(6) put your language switcher block somewhere on screen
(7) new vocabulary, set translation mode to "translate"
(8) make a few terms in this vocabulary, and translate them
(9) attach the term reference of your vocabulary to "article" content type
(10) admin/config/regional/i18n/select = make sure "taxonomy by language" is selected.
(11) create a view, with an exposed filter for your taxonomy, making it required.

Result: in one of the two languages, views attempts to select the first taxonomy term in the list, but because it is in the other language, it can't be selected, resulting in an "An illegal choice has been detected. Please contact the site administrator." error, as seen in the enclosed image.