d117135f5a
Skip possible where_clause_object_safety lints when checking `multiple_supertrait_upcastable` Fix #106247 To achieve this, I lifted the `WhereClauseReferencesSelf` out from `object_safety_violations` and move it into `is_object_safe` (which is changed to a new query). cc `@dtolnay` r? `@compiler-errors`
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.