Add bug! back to late_bound_vars query

compiler/rustc_borrowck/src/universal_regions.rs

@@ -869,6 +869,10 @@ fn for_each_late_bound_region_in_item<'tcx>(
     mir_def_id: LocalDefId,
     mut f: impl FnMut(ty::Region<'tcx>),
 ) {
+    if !tcx.def_kind(mir_def_id).is_fn_like() {
+        return;
+    }
+
     for bound_var in tcx.late_bound_vars(tcx.hir().local_def_id_to_hir_id(mir_def_id)) {
         let ty::BoundVariableKind::Region(bound_region) = bound_var else { continue; };
         let liberated_region = tcx

compiler/rustc_middle/src/ty/context.rs

@@ -2895,7 +2895,9 @@ impl<'tcx> TyCtxt<'tcx> {
         self.mk_bound_variable_kinds(
             self.late_bound_vars_map(id.owner)
                 .and_then(|map| map.get(&id.local_id).cloned())
-                .unwrap_or_default()
+                .unwrap_or_else(|| {
+                    bug!("No bound vars found for {:?} ({:?})", self.hir().node_to_string(id), id)
+                })
                 .iter(),
         )
     }