Stack level too Deep - Rspec

Stack level too Deep - Rspec

I've seen tons of these questions, but none of their solutions are working
for me. I have a single test like so:
describe RolesController do
describe "#delet" do
context "When the user is logged in" do
let(:user) {FactoryGirl.create(:user)}
let(:admin) {FactoryGirl.create(:admin)}
let(:adminRole) {FactoryGirl.create(:adminRole)}
it "Should allow admins to delete roles" do
sign_in admin
put :destroy, :id => adminRole.id
end
end
end
end
Simple, simple, simple. Yet I get the typical error:
1) RolesController#delet When the user is logged in Should allow admins
to delete roles
Failure/Error: Unable to find matching line from backtrace
SystemStackError:
stack level too deep
#
/home/adam/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/notifications/instrumenter.rb:23
and I'm all like ... what? Again I have read dozens of questions on this
and it seems to be something with factory girl but I cannot see what the
issue here would be. I have tons of other tests that instantiate factory
girl based object like this with no issue.