sqlite ruby users - Aug 2005 - set_value undefined in user-defined function?

Hi,

I am running what I think should be a very straightforward script  
lifted almost verbatim from the documentation (http://sqlite- 
ruby.rubyforge.org/classes/SQLite/Database.html#M000089).  Below is  
the script output, the script itself, and the sqlite version  
information.  The platform is Mac OS X 10.4.2.  Any thoughts on why  
this does not work and what changes must be made to correct it?

steve


[thoth@omega:~] > ruby sqlitefn.rb
/usr/local/lib/ruby/site_ruby/1.8/sqlite/resultset.rb:73:in `step'':  
undefined method `set_value'' for #<SQLite::Database::FunctionProxy: 
0x35bb08> (NoMethodError) (SQLite::Exceptions::SQLException)
         from /usr/local/lib/ruby/site_ruby/1.8/sqlite/resultset.rb: 
73:in `commence''
         from /usr/local/lib/ruby/site_ruby/1.8/sqlite/resultset.rb: 
65:in `initialize''
         from /usr/local/lib/ruby/site_ruby/1.8/sqlite/statement.rb: 
104:in `new''
         from /usr/local/lib/ruby/site_ruby/1.8/sqlite/statement.rb: 
104:in `execute''
         from /usr/local/lib/ruby/site_ruby/1.8/sqlite/database.rb: 
194:in `execute''
         from /usr/local/lib/ruby/site_ruby/1.8/sqlite/database.rb: 
276:in `get_first_value''
         from sqlitefn.rb:12

[thoth@omega:~] > cat sqlitefn.rb
require ''sqlite''
include SQLite
SQLITEDB = ''/Users/thoth/Source/new_dictionary/rubydict/kantrik- 
sqlite.db''
db = SQLite::Database.new(SQLITEDB)
db.create_function( "maim", 1, :text ) do |func, value|
    if value.nil?
       func.set_value nil
    else
       func.set_value value.split(//).sort.join
    end
end
db.get_first_value("select maim(word) from words")

[thoth@omega:~] > sqlite -version
2.8.16