Crash on windows when extracting a zip file

[Nullreff]

Windows 7 64 bit

nullreff@obsidian ~/src/minecraft-dota (master)
$ uname -a
MINGW32_NT-6.1 obsidian 1.0.12(0.46/3/2) 2011-05-22 01:19 i686 unknown

nullreff@obsidian ~/src/minecraft-dota (master)
$ ruby --version
ruby 1.9.3p484 (2013-11-22) [i386-mingw32]

nullreff@obsidian ~/src/minecraft-dota (master)
$ cat Bukfile
server 'Spigot-1.7', 'build-14', :jenkins => 'http://ci.md-5.net', :file => /spigot\.jar/
plugin 'banvote', '0.1.1.1'
plugin 'commandbook', '2.2'
plugin 'commandhelper', '3.3.0'
plugin 'deathcontrol', '1.87'
plugin 'minequery', '1.5', :download => 'http://repository.barroncraft.com/downloads/MineQuery-Barroncraft.jar'
plugin 'nocheatplus', '3.10.3-RC-sMD5NET-b626'
plugin 'permissionsex', '1.20.1'
plugin 'shopkeepers', '1.14.2', :download => 'http://dev.bukkit.org/media/files/716/304/Shopkeepers.jar'
plugin 'simpleclans', '2.3.4'
plugin 'simpleclansextensions', '3.6', :download => 'http://repository.barroncraft.com/downloads/SimpleClansExtensions-v3.6.jar'
plugin 'spectate', '2.0'
plugin 'tag', '2.6'
plugin 'vanish', '3.18.1'
plugin 'vault', '1.2.17-b224'
plugin 'worldborder', '1.6.1'
plugin 'worldedit', '5.5.5'
plugin 'worldguard', '5.7.3'
plugin 'pvp-kill-announcer', '3.0'
plugin 'colorme', '3.8.1'
plugin 'fulljoinvip', '1.3'
plugin 'command-signs', '1.9.1.1'
plugin 'pluginreloader', '1.3.1'
plugin 'loginsecurity', '2.0.4'

nullreff@obsidian ~/src/minecraft-dota (master)
$ ~/src/bukin/bin/bukin install
Parsing Bukfile... Done
Fetching information from http://ci.md-5.net... Done
Fetching information from http://api.bukget.org... Done
Installing Spigot-1.7 (build-14)... Done
Installing banvote (0.1.1.1)... Done
Installing commandbook (2.2)... Done
Installing commandhelper (3.3.0)... Error

      Oops, Bukin just crashed.  Please report this at http://bit.ly/bukin-issues
      Be sure to include as much information as possible such as your Bukfile,
      Bukfile.lock and the stack trace below.

c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/entry_set.rb:56:in `dup': can't dup NilClass (TypeError)
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/entry_set.rb:56:in `block in dup'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/entry_set.rb:56:in `each'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/entry_set.rb:56:in `map'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/entry_set.rb:56:in `dup'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/file.rb:84:in `initialize'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/file.rb:96:in `new'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rubyzip-1.1.0/lib/zip/file.rb:96:in `open'
        from c:/Users/nullreff/src/bukin/lib/bukin/installer.rb:36:in `extract_files'
        from c:/Users/nullreff/src/bukin/lib/bukin/installer.rb:19:in `install'
        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:113:in `block (2 levels) in install_resources'
        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:159:in `section'
        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:170:in `installing_section'
        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:111:in `block in install_resources'
        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:103:in `each'
        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:103:in `install_resources'

        from c:/Users/nullreff/src/bukin/lib/bukin/cli.rb:26:in `install'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/thor-0.18.1/lib/thor/command.rb:27:in `run'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/thor-0.18.1/lib/thor/invocation.rb:120:in `invoke_command'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/thor-0.18.1/lib/thor.rb:363:in`dispatch'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/thor-0.18.1/lib/thor/base.rb:439:in `start'
        from c:/Users/nullreff/src/bukin/bin/bukin:7:in `block in <main>'
        from c:/Users/nullreff/src/bukin/lib/bukin.rb:50:in `with_friendly_errors'
        from c:/Users/nullreff/src/bukin/bin/bukin:7:in `<main>'