Elaborate param_env predicates when checking if type outlives involving projection holds

2022-01-09 23:53:57 -05:00
parent e012a191d7
commit ad57295fc9
6 changed files with 90 additions and 6 deletions
--- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
@@ -206,7 +206,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
            })?);

            if let ty::Projection(..) = placeholder_self_ty.kind() {
-                for predicate in tcx.predicates_of(def_id).instantiate_own(tcx, substs).predicates {
+                let predicates = tcx.predicates_of(def_id).instantiate_own(tcx, substs).predicates;
+                debug!(?predicates, "projection predicates");
+                for predicate in predicates {
                    let normalized = normalize_with_depth_to(
                        self,
                        obligation.param_env,