add comment

rust-lang · Jan 18, 2023 · 369f9aa · 369f9aa
1 parent 415aa66
commit 369f9aa
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/compiler/rustc_trait_selection/src/solve/project_goals.rs b/compiler/rustc_trait_selection/src/solve/project_goals.rs
@@ -82,6 +82,7 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
             }
         };
 
+        // Guard against `<T as Trait<?0>>::Assoc = ?0>`.
         struct ContainsTerm<'tcx> {
             term: ty::Term<'tcx>,
         }