use try_normalize_erasing_regions in needs_drop

2021-12-02 20:30:35 +01:00
parent d9baa36190
commit a11994e423
4 changed files with 60 additions and 4 deletions
--- a/compiler/rustc_ty_utils/src/needs_drop.rs
+++ b/compiler/rustc_ty_utils/src/needs_drop.rs
@@ -147,8 +147,10 @@ where
                            Ok(tys) => tys,
                        };
                        for required_ty in tys {
-                            let required =
-                                tcx.normalize_erasing_regions(self.param_env, required_ty);
+                            let required = tcx
+                                .try_normalize_erasing_regions(self.param_env, required_ty)
+                                .unwrap_or(required_ty);
+
                            queue_type(self, required);
                        }
                    }