Use upvar_tys in more places, make it a list

2 files changed, 6 insertions, 5 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs b/compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs
index ef989d8c9d6..9484a50e3a9 100644
--- a/compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs
+++ b/compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs
@@ -291,9 +291,9 @@ pub fn dtorck_constraint_for_ty_inner<'tcx>(
                 return Err(NoSolution);
             }
 
-            constraints.outlives.extend(
-                args.as_generator().upvar_tys().map(|t| -> ty::GenericArg<'tcx> { t.into() }),
-            );
+            constraints
+                .outlives
+                .extend(args.as_generator().upvar_tys().iter().map(ty::GenericArg::from));
             constraints.outlives.push(args.as_generator().resume_ty().into());
         }
 
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index c29696bc817..1f3cea351bb 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -2169,7 +2169,8 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
                         let all = args
                             .as_generator()
                             .upvar_tys()
-                            .chain(iter::once(args.as_generator().witness()))
+                            .iter()
+                            .chain([args.as_generator().witness()])
                             .collect::<Vec<_>>();
                         Where(obligation.predicate.rebind(all))
                     }
@@ -2210,7 +2211,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
                     // Not yet resolved.
                     Ambiguous
                 } else {
-                    Where(obligation.predicate.rebind(args.as_closure().upvar_tys().collect()))
+                    Where(obligation.predicate.rebind(args.as_closure().upvar_tys().to_vec()))
                 }
             }