Seeing a panic where a `try_from` ought simply return an error

[nathanielmanistaatgoogle]

In a test I recently wrote

assert!(bnum::BUintD8::<3>::try_from(0x1000000).is_err());

and what I'm seeing during execution is that the try_from call panics with index out of bounds: the len is 3 but the index is 3. Oughtn't the try_from terminate by returning an error (thus causing the assert to pass)?

[isaacholt100]

Thanks for raising this @nathanielmanistaatgoogle! This is indeed incorrect behaviour. I'm trying to get the next version (v0.14.0) released soon, and this test passes for that. Will let you know when I do release it.