It loads my world now but when I do /fill, it still says I can only build to a limit of 256. I only gave it a space of 1560 because that is the maximum amount my laptop can handle. Is it because of that? The world is never ending down. I mined for an entire minute and no bedrock. Awesome... I even used /tp WorldsHappiest ~ ~-500 ~ and still no bedrock. Too awesome.. So can you fix the /fill bug so I can still use /fill over a limit of 256? I don't know if it is just me or everyone but the search GUI in creative seems a bit messed up. It has no GUI texture and only the items show up. I can't tell if it is the creative menu or my hotbar.
I'd be willing to bet, that that is something Cuchaz is right on top of!
I would suggest reporting the bug on GitHub, however, for the bug to be known of as well as part of an organized list!
Making a GitHub account is free!