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From: Nick Owens <mischief@offblast.org>
Date: Tue, 18 Sep 2018 20:42:18 -0700
Message-ID: <CAH_zEu4vPwyeeEer+XDHsOtpCTA6LiEbnjymnUiQqL0wjzbuog@mail.gmail.com>
Subject: bug: disk/mkfs crashes in libdisk when given a directory as a protofile
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X-Bullshit: open map/reduce scripting TOR markup-oriented software metadata injection-oriented generator 

the following command will crash:

disk/mkfs -a -o .

with a null pointer dereference in libdisk, in the proto file parser.

obviously it is wrong to pass a directory as a protofile to mkfs, but
it was an accident on my part.