gistfile1.txt

NoMethodError (You have a nil object when you didn't expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]):
  lib/heap_dump/dumped_lookup_table.rb:7:in `each'
  lib/heap_dump/dumped_module.rb:38:in `find_class'
  lib/heap_dump/decoder.rb:166:in `decode'
  lib/read_dump.rb:23:in `initialize'
  lib/read_dump.rb:32:in `session'
  app/controllers/heap_viewer_controller.rb:5:in `show'