setfacl can kill a drive

[Steven Penny]

I upgraded to the new Cygwin today, why is this command producing different
permissions? Moreover how do I get it to produce sane results?

    $ cd /cygdrive/c

    $ touch ~/alpha.txt ~+/alpha.txt

    $ ls -l ~/alpha.txt ~+/alpha.txt
    -rw-rwxr--+ 1 Steven None 0 Apr  8 05:06 /cygdrive/c/alpha.txt
    -rw-r--r--  1 Steven None 0 Apr  8 05:06 /home/Steven/alpha.txt

Also I discovered this

    $ setfacl -b /cygdrive/c

After that you get this

    C:\ is not accessible.
    Access is denied.

Luckily this was in a virtual machine. Otherwise, can this be undone? This is
very dangerous, and I feel it should be protected similarly to
"rm --no-preserve-root"

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