RE: Losing minibuffer input

[Drew Adams]

> A safer option seems to disable up/down history navigation when the
> minibuffer contains more than one line. Use M-p/M-n instead.

So your not knowing whether you are on the first/last line or not
will now translate into the up/down keys having different behavior
depending on where you are?  That's precisely (part of) what is
wrong with Juri's "fix".

You guys are trying to fix something that is not broken.
Please don't.