Hello,
The following doesn’t work anymore with the latest CVS version of Ruby 1.8:
···
require 'cgi’
require ‘cgi/session’
cgi = CGI.new
session = CGI::Session.new(cgi)
fg@tkp:~$ ruby test.rb
(offline mode: enter name=value pairs on standard input)
/usr/local/lib/ruby/1.8/cgi.rb:947:in dup': can't dup NilClass (TypeError) from /usr/local/lib/ruby/1.8/cgi.rb:947:into_ary’
from /usr/local/lib/ruby/1.8/cgi/session.rb:37:in initialize' from test.rb:7:innew’
from test.rb:7
Looks like the bug follows the changes on CGI#[] done on Dec 28th.
What makes me love Ruby is the short term solution:
class NilClass
def dup
nil
end
end
… and my 12000 lines cgi script works again 
Francois
PS: BTW, why nil.dup is illegal by default ?
there is also still the issue that in lib/cgi/session.rb:77-85 the = method
prevents user defined session managers to store anything but Strings in there
sessions, eg :
77 def []=(key, val)
78 unless @write_lock
79 @write_lock = true
80 end
81 unless @data
82 @data = @dbman.restore
83 end
84 @data[key] = String(val)
85 end
in my own code i’ve done
which has allowed me to write a session::pstore class which stores any type of
object.
if this were changed and MemoryStore and FileStore cast val to String the
changes would be backward compatible while still allowing development of user
defined sessions which store more than strings.
-a
···
On Fri, 17 Jan 2003, Yukihiro Matsumoto wrote:
Hi,
In message “Bug in CGI::Session ?” > on 03/01/17, Francois Goret fg@siamecommerce.com writes:
The following doesn’t work anymore with the latest CVS version of Ruby 1.8:
require ‘cgi’
require ‘cgi/session’
cgi = CGI.new
session = CGI::Session.new(cgi)
fg@tkp:~$ ruby test.rb
(offline mode: enter name=value pairs on standard input)
/usr/local/lib/ruby/1.8/cgi.rb:947:in dup': can't dup NilClass (TypeError) from /usr/local/lib/ruby/1.8/cgi.rb:947:in to_ary’
from /usr/local/lib/ruby/1.8/cgi/session.rb:37:in initialize' from test.rb:7:in new’
from test.rb:7
Looks like the bug follows the changes on CGI# done on Dec 28th.
Thank you for pointing out. I will fix this soon.
matz.
–
====================================
Ara Howard
NOAA Forecast Systems Laboratory
Information and Technology Services
Data Systems Group
R/FST 325 Broadway
Boulder, CO 80305-3328
Email: ahoward@fsl.noaa.gov
Phone: 303-497-7238
Fax: 303-497-7259
====================================