Hello,

I'm in the process of upgrading my app to Rails 5. When running the tests with rails 5 enabled I started to get "LocalJumpError: no block given (yield)" on several object creation sentences like this one:

let(:entity)

This started to happen after I upgraded to Rails 5.0.0
However, it doesn't happen in all cases where I use 'let' like that (also happens with let! ) So I'm not entirely sure why it is happening.
I also tried using build instead of create on that line and the error doesn't show up.

Running rspec -b to see the trace, I identified the issue on this line:

https://github.com/mongodb/mongoid/blob/master/lib/mongoid/clients/options.rb#L25

The issue disappears if I replace that line (yield self) with just:

self

I'm not sure however if this is a feasible fix, and of course it would be better to include it in a new mongoid version instead, if it's a correct fix. Hence this ticket.

Can you confirm if someone else has seen this issue when upgrading to Rails 5?

I'll try to reproduce this in a test on a Pull Request but wanted to report this to get some early feedback if possible.