Fix assert_assignable for array types

[rust.git] / src / unsize.rs

diff --git a/src/unsize.rs b/src/unsize.rs
index d594731b4dfce5870bc9358d0a5edf466f64fe60..fd63c3ecddbdfd9cdb2365ca0aec9bca6bc18d5e 100644 (file)
--- a/src/unsize.rs
+++ b/src/unsize.rs
@@ -31,21 +31,10 @@ pub(crate) fn unsized_info<'tcx>(
             if data_a.principal_def_id() == data_b.principal_def_id() {
                 return old_info;
             }
-            // trait upcasting coercion
-
-            // if both of the two `principal`s are `None`, this function would have returned early above.
-            // and if one of the two `principal`s is `None`, typechecking would have rejected this case.
-            let principal_a = data_a
-                .principal()
-                .expect("unsized_info: missing principal trait for trait upcasting coercion");
-            let principal_b = data_b
-                .principal()
-                .expect("unsized_info: missing principal trait for trait upcasting coercion");
 
-            let vptr_entry_idx = fx.tcx.vtable_trait_upcasting_coercion_new_vptr_slot((
-                principal_a.with_self_ty(fx.tcx, source),
-                principal_b.with_self_ty(fx.tcx, source),
-            ));
+            // trait upcasting coercion
+            let vptr_entry_idx =
+                fx.tcx.vtable_trait_upcasting_coercion_new_vptr_slot((source, target));
 
             if let Some(entry_idx) = vptr_entry_idx {
                 let entry_idx = u32::try_from(entry_idx).unwrap();
@@ -77,12 +66,10 @@ fn unsize_ptr<'tcx>(
         (&ty::Ref(_, a, _), &ty::Ref(_, b, _))
         | (&ty::Ref(_, a, _), &ty::RawPtr(ty::TypeAndMut { ty: b, .. }))
         | (&ty::RawPtr(ty::TypeAndMut { ty: a, .. }), &ty::RawPtr(ty::TypeAndMut { ty: b, .. })) => {
-            assert!(!fx.layout_of(a).is_unsized());
-            (src, unsized_info(fx, a, b, old_info))
+            (src, unsized_info(fx, *a, *b, old_info))
         }
         (&ty::Adt(def_a, _), &ty::Adt(def_b, _)) if def_a.is_box() && def_b.is_box() => {
             let (a, b) = (src_layout.ty.boxed_ty(), dst_layout.ty.boxed_ty());
-            assert!(!fx.layout_of(a).is_unsized());
             (src, unsized_info(fx, a, b, old_info))
         }
         (&ty::Adt(def_a, _), &ty::Adt(def_b, _)) => {
@@ -140,7 +127,7 @@ pub(crate) fn coerce_unsized_into<'tcx>(
         (&ty::Adt(def_a, _), &ty::Adt(def_b, _)) => {
             assert_eq!(def_a, def_b);
 
-            for i in 0..def_a.variants[VariantIdx::new(0)].fields.len() {
+            for i in 0..def_a.variant(VariantIdx::new(0)).fields.len() {
                 let src_f = src.value_field(fx, mir::Field::new(i));
                 let dst_f = dst.place_field(fx, mir::Field::new(i));
 
@@ -213,7 +200,7 @@ pub(crate) fn size_and_align_of_dst<'tcx>(
 
             // Packed types ignore the alignment of their fields.
             if let ty::Adt(def, _) = layout.ty.kind() {
-                if def.repr.packed() {
+                if def.repr().packed() {
                     unsized_align = sized_align;
                 }
             }