bug#39379: 27.0.60; Fix for #38457 broke ido-vertical-mode

[Jimmy Yuen Ho Wong]

On 01/02/2020 08:12, Eli Zaretskii wrote:
>> From: Jimmy Yuen Ho Wong <wyuenho@gmail.com>
>> Date: Fri, 31 Jan 2020 23:53:19 +0000
>>
>> Fix for #38457, commit 3b0938c0420de2b845e7e8f8fbbb57ddc61718f2, seems
>> to have broken ido-vertical-mode and perhaps other minor modes that uses
>> similar techniques to render a custom ido completion list. Is there
>> another fix possible, or better yet, introduce a new overridable
>> function that controls how the prompt is displayed?
>>
>> https://github.com/creichert/ido-vertical-mode.el/issues/48
> Please show a recipe to reproduce the problem.  I don't use
> ido-vertical-mode, and the issue you point to doesn't provide any
> description of the actual problem, either.  So it's unclear what
> exactly was broken by that commit and why.
>
> Thanks.

Steps for reproduction:

1. $ echo "(ido-mode)(require 'ido-vertical-mode)(ido-vertical-mode)" >
.emacs

2. $ emacs

3. C-x C-f

4. The Find file prompt is missing since that commit.

I've also attached screenshots here.

https://github.com/creichert/ido-vertical-mode.el/issues/48#issuecomment-581033055