Sort somem diagnostics by DefPathStr instead of DefId

Author: oli-obk

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -2665,7 +2665,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 traits.push(trait_pred.def_id());
             }
         }
-        traits.sort();
+        traits.sort_by_key(|id| self.tcx.def_path_str(id));
         traits.dedup();
 
         let len = traits.len();
@@ -2888,7 +2888,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     ) -> bool {
         if !valid_out_of_scope_traits.is_empty() {
             let mut candidates = valid_out_of_scope_traits;
-            candidates.sort();
+            candidates.sort_by_key(|id| self.tcx.def_path_str(id));
             candidates.dedup();
 
             // `TryFrom` and `FromIterator` have no methods