linux-ext4 - [Bug 206613] New: On hitting tab key from terminal against a directory name ending with ':\' doesnot shows files/dir inside it rather shows dir name itself

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Message-ID: <bug-206613-13602@https.bugzilla.kernel.org/>
Date:   Thu, 20 Feb 2020 17:15:53 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 206613] New: On hitting tab key from terminal against a
 directory name ending with ':\' doesnot shows files/dir inside it rather
 shows dir name itself

https://bugzilla.kernel.org/show_bug.cgi?id=206613

            Bug ID: 206613
           Summary: On hitting tab key from terminal against a directory
                    name ending with ':\' doesnot shows files/dir inside
                    it rather shows dir name itself
           Product: File System
           Version: 2.5
    Kernel Version: 5.5.0-050500-generic
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: ext4
          Assignee: fs_ext4@...nel-bugs.osdl.org
          Reporter: cubonix@...il.com
        Regression: No

Hi All.
Recently I bought a new laptop for usability purpose of my wife I created some
folders by Name C:\ D:\ E:\ and mounted  3 partitions (as she is a win user),
lately I have observed if hit tab againt these 3 dir , it does not exposes
files/dir which is contained. Which generally doesnot happens.

Log Snippet
===========
root@...vis:~# uname -a
Linux jarvis 5.5.0-050500-generic #202001262030 SMP Mon Jan 27 01:33:36 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
root@...vis:~# 
root@...vis:~# cat /etc/os-release 
NAME="Ubuntu"
VERSION="19.10 (Eoan Ermine)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 19.10"
VERSION_ID="19.10"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=eoan
UBUNTU_CODENAME=eoan

When I normally hit tab against any dir it exposes files/dir 
=============================================================
root@...vis:~# cd /
bin/        cdrom/      etc/        lib/        lib64/      lost+found/ mnt/   
    proc/       run/        srv/        tmp/        var/
boot/       dev/        home/       lib32/      libx32/     media/      opt/   
    root/       sbin/       sys/        usr/        
root@...vis:~# 

But when I try to hit tab against any dir ending with :\
==============================================================

root@...vis:/home/abhishek/Desktop# ls
'C:\'  'D:\'  'E:\'

abhishek@...vis:~/Desktop$ cd 'C:\'^C =========>does not recommends any thing
abhishek@...vis:~/Desktop$ cd C:\\ =========>does not recommends any thing

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