Reported on #wikimedia-tech on 2016-04-21:
<abolsutely3> I was trying to upload a replacement image in English Wikipedia yesterday, but it gets stuck on uploading when I hit Save. I was told yesterday there's an error in my JS console?
<abolsutely3> 09:16:06.172 TypeError: finishStash(...) is undefined UP.finishStashUpload/<() load.php:80 .Deferred/promise.then/</</<() load.php:47 jQuery.Callbacks/fire() load.php:45 jQuery.Callbacks/self.add() load.php:45 .Deferred/promise.then/</<() load.php:47 .each() load.php:5 .Deferred/promise.then/<() load.php:47 .Deferred() load.php:47 .Deferred/promise.then() load.php:46 UP.finishStashUpload() load.php:80 mw.Upload.BookletLa
Image attempted: https://www.dropbox.com/s/ycb3k5odvi3tjh2/gb-tm-full-1.jpg?dl=0
note: the problem occurred during the codfw datacenter test