Borrowing a reserved instance from a pool raises a confusing error

[64kramsystem]

When borrowing a reserved instance from a pool, the error message is confusing:

Attempt to borrow destroyed object at [Idx: 0; Gen: 1] handle.

it makes one think that the given instance has been previously removed from the pool (instead, it's been reserved).

I don't know if it's possible, but it'd be very clear if the message was something like:

Attempt to borrow reserved object at [Idx: 0; Gen: 1] handle.