Raised by at least another user.

(By “reproduced locally” I meant “reproduced by me as well”, of course [no I did not fully install MediaWiki With MMV just for the sake of this bug ;-)]

Boy, this is odd - the image info seems to come back fine, and there are no errors.

Our error reporting kind of sucks ( https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/268 is supposed to solve that but it is not deployed yet) so probably one of the metadata promises reject (could be anything, not just imageinfo).

For reference, here is a quick debug code which adds functionality from #268 on the fly:

for (key in mw.mediaViewer) {

if (key.match(/Provider$/)) {
    (function ( provider ) {
        var oldGet = provider.get;
        provider.get = function () {
            return oldGet.apply( provider, arguments ).fail( function ( error ) {
                console.log( provider.constructor.name + ' failed: ', error );
            } );
        };
    } ( mw.mediaViewer[key] ));
}

}

According to that, the problem is with userinfo.

This seems to be the same issue as bug 62019. The fix there was ported back to wmf16, but frwiki is still on wmf15. This will change with tomorrow's deploy, so marking this as fixed.