I know the rules for class variables have changed in 1.9, but I am not
understanding this behaviour (this works ok in 1.8.x):

>> module M
>>   def self.included(klass)
>>     klass.class_eval("@@y = 22")
>>     class <<klass
>>       @@x = 33
>>     end
>>   end
>> end
=> nil
>>
?> class B
>>   include M
>>   def show
>>     p @@y
>>     p @@x
>>   end
>> end
=> nil
>>
?> B.new.show
22
NameError: uninitialized class variable @@x in B
from (irb):14:in `show'
from (irb):18
from :0
$ ruby -v
ruby 1.9.0 (2004-07-29) [i686-linux]


Stephen