1c771fec33
Make NLL Type Relating Eager
We previously instantiated bound regions in nll type relating lazily. Making this eager is more consistent with how we handle type relating in [`higher_ranked_sub`](0a3b557d52/compiler/rustc_infer/src/infer/higher_ranked/mod.rs (L28)
) and should allow us to short circuit in case there's structural equality.