Results 4 comments of Marc Burns

Yeah, actually, I can't believe I overlooked this: `connection-pool-lease` first checks if there's an entry in the `key=>conn` table for the current thread, and immediately returns the connection already leased...

Thanks for finding that and sorry about the bugs! :/

I'm guessing nothing in that test calls `check_type_size` - I will try to add a test for this.