add FIXME

Author: lcnr

compiler/rustc_trait_selection/src/solve/inspect/analyse.rs

@@ -47,6 +47,12 @@ impl<'a, 'tcx> InspectCandidate<'a, 'tcx> {
         self.result.map(|c| c.value.certainty)
     }
 
+    /// Visit the nested goals of this candidate.
+    /// 
+    /// FIXME(@lcnr): we have to slightly adapt this API
+    /// to also use it to compute the most relevant goal
+    /// for fulfillment errors. Will do that once we actually
+    /// need it.
     pub fn visit_nested<V: ProofTreeVisitor<'tcx>>(
         &self,
         visitor: &mut V,