private method `equal?' called for {}:Hash

I have two servers in production. Same installation, same ruby
version, same rails, deployed using capistrano.

Suddendly one server gives this error: private method `equal?' called
for {}:Hash even if I start the console:

/var/www/reputation/releases/20081006154941/vendor/rails/activerecord/
lib/../../activesupport/lib/active_support/core_ext/class/
inheritable_attributes.rb:127:in `inherited':NoMethodError: private
method `equal?' called for {}:Hash
/var/www/reputation/releases/20081006154941/vendor/rails/activerecord/
lib/../../activesupport/lib/active_support/core_ext/class/
inheritable_attributes.rb:127:in `inherited':NoMethodError: private
method `equal?' called for {}:Hash
/var/www/reputation/releases/20081006154941/vendor/rails/activerecord/
lib/../../activesupport/lib/active_support/core_ext/class/
inheritable_attributes.rb:127:in
`inherited_without_layout':NoMethodError: private method `equal?'
called for #<Hash:0xb76c5978>

What can it be ?

I have deleted, rebooted and redeployed from scratch but the error
persists.

Hi,

Did you solve this problem? I have exactly the same issue...

H.

Hi,

it appears it was Debian specific issue in my problem.

Debian's libgsl-ruby library automatically included GSL namespace when
library was included. I had to edit gsl.rb file and comment out
"include GSL" to prevent conflict with activesupport.

H.