rspec users - Oct 2011 - Specs failing when run outside Spork with TypeError: superclass mismatch for class Attribute

When I run my specs inside spork, they all just pass without any
problems, but once I try to run them without spork, I end up with

     Failure/Error: Unable to find matching line from backtrace
     TypeError:
       superclass mismatch for class Attribute

on each request spec.

Here''s a gist with the whole stack trace, request specs &
spec_helper.rb https://gist.github.com/1327141

I''m running Rails 3.1.1 on Ruby 1.9.2

On Oct 31, 2011, at 4:59 AM, Jakub Arnold wrote:
> When I run my specs inside spork, they all just pass without any
> problems, but once I try to run them without spork, I end up with
> 
>     Failure/Error: Unable to find matching line from backtrace
>     TypeError:
>       superclass mismatch for class Attribute
> 
> on each request spec.
> 
> Here''s a gist with the whole stack trace, request specs &
> spec_helper.rb https://gist.github.com/1327141
> 
> I''m running Rails 3.1.1 on Ruby 1.9.2
Hey Jakub,

I started to look at this yesterday but got nowhere, and it''s going to
be a while before I can look at it again. My theory is that there is a another
Attribute class defined by one of the gems in your app, and due to differences
in load order, the right one is winning when you use spork, but the wrong one is
winning when when you don''t. Please investigate that and report what
you find back here.

HTH,
David