bug#60048: 30.0.50; Freeze when next-line on details in Completions list

[Juri Linkov]

> Emacs freeze when the command `previous-line-completion' or
> `next-line-completion' are executed in Completions list and the cursor
> is positioned at some details (the prefix and suffix annotations).

Thanks for the bug report.  When the cursor is on a prefix or a suffix,
where in your opinion typing <down> should go?  Do you expect that
it should search for the completion candidate from the left
or from the right side after moving to the next line if it
can't see the completion candidate already near point?