This gem cannot extract magic.tgz archive from supermarket

[kamaradclimber]

To reproduce (with mixlib-archive 0.4.1)

curl -L https://supermarket.chef.io/cookbooks/magic/download -o magic.tgz

require 'mixlib/archive'
tar = Mixlib::Archive.new("magic.tgz")
dir = '/tmp/tmp.Hxu9djBfyJ'
FileUtils.mkdir(dir)
tar.extract(dir)

This fails with:

ArgumentError: "\x80\x00\x00\x007\xB5\x91\x9E" is not an octal string
from /usr/lib/ruby/2.5.0/rubygems/package/tar_header.rb:128:in `strict_oct'

First time I've seen this is trying to use chef install command on a Policyfile depending on magic cookbook.

[kamaradclimber]

seems to be seen in berkshelf as well: berkshelf/berkshelf#1744