fails:Object#instance_exec raises a LocalJumpError unless given a block
fails:Object#instance_exec has an arity of -1
fails:Object#instance_exec accepts arguments with a block
fails:Object#instance_exec doesn't pass self to the block as an argument
fails:Object#instance_exec passes any arguments to the block
fails:Object#instance_exec only binds the exec to the receiver
fails:Object#instance_exec binds self to the receiver
fails:Object#instance_exec binds the block's binding self to the receiver
fails:Object#instance_exec executes in the context of the receiver
fails:Object#instance_exec has access to receiver's instance variables
fails:Object#instance_exec invokes Method objects without rebinding self
fails:Object#instance_exec sets class variables in the receiver
fails:Object#instance_exec raises a TypeError when defining methods on an immediate
fails:Object#instance_exec raises a TypeError when defining methods on numerics
