feat: a lot

evaluator/nixjit_hir/src/utils.rs

@@ -125,13 +125,13 @@ pub fn downgrade_inherit(
                 ));
             }
         };
-        let expr = from.map_or_else(
+        let expr = from.as_ref().map_or_else(
             // If `from` is None, `inherit foo;` becomes `foo = foo;`.
             || Var { sym: ident.clone() }.to_hir(),
             // If `from` is Some, `inherit (from) foo;` becomes `foo = from.foo;`.
             |expr| {
                 Select {
-                    expr,
+                    expr: unsafe { expr.clone() },
                     attrpath: vec![Attr::Str(ident.clone())],
                     default: None,
                 }