From: Luka Stolyarov <lukich@...>
Date: 2010-06-08T14:14:22+09:00
Subject: Rubyzip - `dup': can't dup NilClass (TypeError)

Hello.  I've trying to figure out rubyzip.  Here's the code I had:

require 'rubygems'
require 'zip/zip'

zf = Zip::ZipFile.open('616910.zip')

However, when I run it, it throws an error

/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1163:in
`dup': can't dup NilClass (TypeError)
        from
/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1163:in
`dup'
        from
/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1163:in
`map'
        from
/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1163:in
`dup'
        from
/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1399:in
`initialize'
        from
/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1410:in
`new'
        from
/Users/lukastolyarov/.gem/ruby/1.8/gems/rubyzip-0.9.4/lib/zip/zip.rb:1410:in
`open'
        from zip.rb:5

I'm pretty sure the zip file is there and is not empty.  What might be
causing it?  I googled the problem, but couldn't find a definitive
answer.

Thank you,
Luka
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