Hmm, interesting. I'll investigate further if time permits.

On Fri, Apr 21, 2017 at 7:45 PM, Noam Postavsky <
npostavs@users.sourceforge.net> wrote:

> On Fri, Apr 21, 2017 at 9:23 PM, Tianxiang Xiong
> <tianxiang.xiong@gmail.com> wrote:
> > In `ido.el`, the `ido-everywhere` minor mode overrides
> > `read-file-name-function` and `read-buffer-function`. However, it does
> not
> > override `completing-read-function` with `ido-completing-read`.
> >
> > Should it? This is what Helm does, and it is convenient for the user.
>
> ido-completing-read currently does not entirely replace completing-read,
> see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=15430
> https://github.com/DarwinAwardWinner/ido-ubiquitous
>