Bdtyktl

I just ran apt-get update && apt-get upgrade and this is what I got:

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Calculating upgrade... Done

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

1 not fully installed or removed.

After this operation, 0 B of additional disk space will be used.

Do you want to continue? [Y/n] y

Setting up dradis (3.1.0~rc2+git20160609-0kali2) ...

Warning: The home dir /var/lib/dradis you specified already exists.

The system user `dradis' already exists. Exiting.

/usr/lib/ruby/vendor_ruby/bundler/resolver.rb:194:in `block in initialize': 

    undefined method `add_root_vertex' for Molinillo::DependencyGraph::Molinillo::DependencyGraph (NoMethodError)

    from /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:194:in `initialize'

    from /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:181:in `new'

    from /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:181:in `resolve'

    from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:200:in `resolve'

    from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:140:in `specs'

    from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:185:in `specs_for'

    from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:174:in `requested_specs'

    from /usr/lib/ruby/vendor_ruby/bundler/environment.rb:18:in `requested_specs'

    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:13:in `setup'

    from /usr/lib/ruby/vendor_ruby/bundler.rb:127:in `setup'

    from /usr/lib/ruby/vendor_ruby/bundler/setup.rb:8:in `<top (required)>'

    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'

    from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'

    from /usr/lib/dradis/config/boot.rb:3:in `<top (required)>'

    from bin/rake:2:in `require_relative'

    from bin/rake:2:in `<main>'

dpkg: error processing package dradis (--configure):

 subprocess installed post-installation script returned error exit status 1

Errors were encountered while processing:

 dradis

E: Sub-process /usr/bin/dpkg returned an error code (1)

What should I do?

deb packages have some hooks defined, where scripts can be executed while the package is installed, uninstalled etc. It seems that in your case one such script fails, so the whole installation fails:

 /usr/lib/ruby/vendor_ruby/bundler/resolver.rb:194:in `block in initialize': 

    undefined method `add_root_vertex' for Molinillo::DependencyGraph::Molinillo::DependencyGraph (NoMethodError)

So Bundler can't find a method in a library it would like to call. Judging from this issue at Bundler's Github repo, you might be using an outdated version of Bundler. So maybe upgrading Bundler would help. How exactly you need to do that depends on how you installed Ruby including Bundler (package system, RVM, rbenv, ...)

I had the same issue in Kali. Removing dradis fixed it for me.

apt-get remove dradis