0dedc6c054
Don't try to add nested predicate to Rustdoc auto-trait `ParamEnv` Fixes #80233 We already have logic in `evaluate_predicates` that tries to add unimplemented predicates to our `ParamEnv`. Trying to add a predicate that already holds can lead to errors later on, since projection will prefer trait candidates from the `ParamEnv` to predicates from an impl.