Change wrong assertion which causes ICE

Signed-off-by: FedericoBruzzone <federico.bruzzone.i@gmail.com>

compiler/rustc_ty_utils/src/layout.rs

@@ -104,7 +104,7 @@ fn map_error<'tcx>(
             // This is sometimes not a compile error if there are trivially false where clauses.
             // See `tests/ui/layout/trivial-bounds-sized.rs` for an example.
             assert!(field.layout.is_unsized(), "invalid layout error {err:#?}");
-            if !field.ty.is_sized(cx.tcx(), cx.typing_env) {
+            if cx.typing_env.param_env.caller_bounds().is_empty() {
                 cx.tcx().dcx().delayed_bug(format!(
                     "encountered unexpected unsized field in layout of {ty:?}: {field:#?}"
                 ));