Steps:
1. Start GNU Emacs 26.0.90 GUI via `Emacs -Q' on macOS 10.13.1.
2. Create some symbolic files (e.g. ~/.zshrc -> ~/.dotfiles/.zshrc) in the home folders.
3. Enable `ido-mode`, and `find-file` to open the symbolic files (~/.zshrc).

Results:
`~/.zshrc/` is showed in minibuffer after pressing `TAB`, and Emacs treats it as a folder and create a new one.
In Emacs 25, only `~/.zshrc` is showed, and Emacs gives a prompt of opening a symbolic file.

Am I missing anything?

Thanks!
________________________________
From: Eli Zaretskii <eliz@gnu.org>
Sent: Friday, November 10, 2017 8:13 AM
To: Vincent Zhang
Cc: 29231@debbugs.gnu.org
Subject: Re: bug#29231: 26.0.90; invald file name for symbolic files

> From: Vincent Zhang <vincent_chueng@hotmail.com>
> CC: "29231@debbugs.gnu.org" <29231@debbugs.gnu.org>
> Date: Fri, 10 Nov 2017 02:49:34 +0000
>
> I reproduced with "emacs -Q" with emacs 26.0.90 on macOS10.13.1. No issue on emacs 25.3.1. Thanks!

Great, so please tell how you reproduced this.  That is, please
describe step by step what you did, both inside Emacs and outside it,
to reproduce the problem.

Thanks.