Directory symbolic links inside the WSL root are not recognized by Windows programs

[sysprogs]

We are using Windows 1803 (build 17134.112) and WSL with Ubuntu.
It appears that symlinks created from WSL outside the rootfs are properly recognized by Windows programs, e.g.:

(from bash)

cd /mnt/e/temp
mkdir dir1
ln -s dir1 dir2

(from cmd.exe)

cd /d e:\temp
dir

yields:

06/14/2018  10:36 AM    <DIR>          dir1
06/14/2018  10:36 AM    <SYMLINKD>     dir2 [dir1]

However, doing this inside the WSL's rootfs doesn't work:

(from bash)

cd ~
mkdir dir1
ln -s dir1 dir2

(from cmd.exe)

cd /d C:\Users\testuser\AppData\Local\Packages\CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc\LocalState\rootfs\home\testuser
dir

yields:

06/14/2018  10:37 AM    <DIR>          dir1
06/14/2018  10:37 AM                 4 dir2

Here dir2 is not shown as a directory symlink, but instead as a test file containing the symlink target ("dir1"). Opening "dir2" from Windows Explorer or any other Windows tools doesn't work either.

[therealkenc]

other Windows tools doesn't work either.

Correct. It doesn't.

#1524